A percentage is a number or ratio expressed as a fraction of $100$. It is often denoted using the percent sign, "$\%$", or the abbreviation "$\mathrm{pct}$." -Wikipedia. Percentages are used when describing portions or proportional changes.

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What does it mean to “cut-off 10% your weakest exam”?

Say that I have two exam grades: $$e_1$$ and $$e_2$$ and that exam $e_1$ is worth $p_1$ of your grade and $p_2$ percent of your grade ($p_1 + p_2 = 1 $). If on top of that weighting I promise to ...
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1answer
33 views

What is my maths score as a percentage?

In my maths module, there are 2 phases. In the 1st phase, there are 2 tests. In the 2nd phase there is 1 test. Phase 1's total weight is 60% and phase 2's total weight is 40%. This is what I ...
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1answer
13 views

Work hourly wage, percentage increase

The wage of jack is increased by 15% and at the same time, the working hours is decreased by 10%. Then, by what percent the hourly wage of jack is decreased or increased? (approximately) I tried ...
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3answers
218 views

Getting percentage difference between two numbers?

For example, if someone got a raise in salary and they were getting paid 80,000 and are now getting paid 85,000 how can you work ...
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1answer
17 views

Help clarifying fraction and percentage question.

I have the following problem: Convert the mixed number $18 \frac 25 \%$ to an improper fraction, then, use the definition of percent to convert to fractional notation. If I follow the steps of ...
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3answers
55 views

How to calculate what percentage of 228 is 199?

I'm a simple man who doesn't know much math. Sometimes in my work and life I've to do math calculations. Today was one of those days and I've spent the last hour trying to figure this out. Look. ...
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1answer
19 views

What is 90% of a 1:10 scale drawing? [closed]

I have reduced a 1:10 scale drawing by 80% and 90%. What are the new scales respectively? Thanks in advance, Digby.
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1answer
15 views

What will the average amount be by year 2025 and 2050?

The HDI for Burkina Faso is $0.388$. Annually, its average HDI increases by $2.6090\%$. If this continues what will the HDI be by $2025$ and again by year $2050$?
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1answer
19 views

Percentage Increase and Decrease

I am having a kind of a chicken-egg problem. For example, I am wholesale merchant and I want to sell an orange for \$100 to the end user. I know that the retail merchant adds 12% on top of my price, ...
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0answers
9 views

Solve for X: How to calcuate proportional margin?

I dont know what is the name of these series. But we have the values for 1. A1, A2...An 2. P1, P2...Pn 3. FinalSalesAmount We need to calculate X in in the below equation: A1/(1-P1*x) + ...
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1answer
29 views

Calculating percentages for teams (HEELP!!!) [closed]

I want to calculate the percentage of the team championship.There are 4 teams in the tournament and there are a total of 6 weeks in 12 games playing. in week 4, league table like this; Annddd ...
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0answers
21 views

Deciphering game formula

Hello I'm trying to find a Formula of a certain system(Game) and would like some help. I will try not to get into the context of the game too much, but some times it will be necessary for better ...
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3answers
88 views

What percentage of 316.1 million is 20 million?

I am horrible at percentages and I keep getting 15.805% as the answer to the question posed in the title, but according to others that is wrong and the answer is 6.33%. I can't wrap my head around ...
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1answer
15 views

Work out smaller percentages with base value at 130% [closed]

I have a table of numbers in a Spreadsheet that I need to give a percentage (70% -> 130%) and calculate the outcome based on the data I already have, which is the numbers at 130%, not 100%. It's not ...
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0answers
12 views

Help with finding an optimal bilingual skill-based routing calculation.

First time post, I'm not sure if it is in the correct forum but this seems to be as a good place to try: I was wondering if anyone out there had experience dealing with a similar issue or knew of any ...
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2answers
30 views

10% of ten English pounds £

I, unfortunately, have serious dyscalculia and struggle with maths. This makes figuring out simple everyday maths quite difficult. I'd really appreciate the help with this. Thanks in advance.
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0answers
12 views

Difficult percentage question

25% of a class passed both tests, but 40% passed the first. What percentage of the first test passers also passed the second test?
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0answers
17 views

Calculate Percentage of Speedup

What is the overall speedup of an airplane spending 65% of its time on a part where it uses a boost that increases its speed by 50%? My answer: ...
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1answer
34 views

Calculating percentages of a percent of a percent

A student is taking a class where $40\%$ of his or her grade is based on homework and the remaining $60\%$ is based on tests. There are a total of 12 homework assignments and 4 tests. The student ...
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2answers
25 views

A Percentage of Averages

A company brags about the speed of their service, "75% of our assignments are completed in an average of 20 days." Is this a meaningful claim? Or is it kind of like saying, "60% of the time, it ...
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1answer
35 views

What information guarantees a ranking in the 90th percentile is greater than a ranking in the 70th percentile?

Consider the following facts: Person A's salary is in the 90th percentile in Company A. Person B's salary is in the 70th percentile in Company B. The question is: What piece of information is ...
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0answers
21 views

Is this a proper formula for return rate?

Suppose we want to find the return rate of a casino game. For example, if a player brings 1000 USD to the game, pays a total cost of 1000 USD to play the game, regardless of the amount won (I will ...
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1answer
11 views

Given a % of change and the resulting value after the change, how do you calculate the original value?

Given a % of change and the resulting value after the change, how do you calculate the original value? For example, X increased by 50% = 150. In this case we can easily use guess and check to see ...
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0answers
52 views

Not getting the percentage prblem

In a group of people solicited by a charity, 30% contributed \$40 each, 45% contributed \$10 each and the rest contributed \$12 each. What is the percentage of the total contributed came ...
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1answer
18 views

Percentage increase of two percentages

Can anyone help me with this problem? What is the percentage increase from 27.7% to 28.2%? I came up with 1.8% but my brother keeps telling me it's 18%
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0answers
19 views

How to add up percentages together

I have a strange issue i just can't understand... I have a user that has "PM" productive minutes assigned to it. Part of this time is assigned to do clerical work, we have "CW%1" applied to it to ...
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1answer
22 views

Probability using percentages of percentages

(A) 55% of the students at a certain college are females. (B) 7% of the students in this college are majoring in computer science. (C) 4% of the students are women majoring in computer science. ...
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1answer
31 views

Calculate percentage between two sensorvalues

I've got two distance sensors on the sides of a car, and I'm trying to come up with a formula that will attempt to put the car so that it has an equal distance on both sides. There is an IR sensor on ...
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1answer
14 views

Profit and loss problem

A shopkeeper allows a discount of 12.5% on the marked price of a certain article and makes a profit of 20%. If the article costs the shopkeeper Rs 210, then the marked price of the article will be?
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0answers
19 views

How to define percentage values in terms of scalar

Imagine a game in which you choose many cards with different A,B,C values. Such as : Card 1 A - 4 B - 5 C - 6 Card 2 A - 2 B - 7 C - 4 ... and so on.. To ...
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1answer
47 views

Why the answer is not negative here?

If one number is $80\%$ of the other and $4$ times the sum of their squares is $656$, then What are the numbers? My answer is - let the two numbers be x and y. $x = \frac 45 y$ $4(x^2 + y^2) = ...
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1answer
19 views

Is it possible that the percentages can be negative?

Can we have the percentages as negative? Is percentages always a positive number? Recently, I was solving the algebraic question, and it boils down to $n^2 = 100$. Here, $n$ was the percentage - So, ...
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2answers
62 views

Does almost every whole number integer contain any of the digits zero through nine?

For example, how many whole numbers contain an eight? Well, for whole numbers less than ten, it's just eight itself, so that's 10% and for whole numbers less than 100, there are 8, 18, 28, 38, 48, ...
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0answers
21 views

Compute elasticity then find approximate percent change in demand

I am given this homework problem and I do not know how to solve part b. Here is the problem: Economist use demand functions to describe how much of a commodity can be sold at varying prices. For ...
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1answer
29 views

Profit and loss problems [closed]

A shopkeeper allows 10% discount on goods when he sells without credit. Cost price of his goods is 80% of his selling price. If he sells his goods by cash, then his profit is?
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4answers
19 views

Percentages not adding up

I have a series of percentages: 132/220 (60%) and 88/220 (40%). Now when I break them down into subcategories and then recalculate the percentages them come out 5% different. 81/140 (58%) and ...
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3answers
30 views

Finding out how out how much is 100%

I know 14% is 41. So how much is 100%? I know it is simple math, but... you know how it is being out of school for a few years. If at all possible, I'd like to see the equation too.
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2answers
50 views

Calculating the percentages of net profit over cost

I am stuck at a couple of percentage questions. A merchant sells an item at a 20% discount. But still makes a profit of 20% of the COST. What percentage of the cost would the Gross profit on the item ...
0
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2answers
31 views

Percentage Question from GRE

A question in GRE states: In a survey of a town,it was found that 65% of the people surveyed watched the news on television,40% read newspaper, and 25% read a newspaper and watched the news on ...
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2answers
36 views

Percentage evaulation Queestion from GRE

A question from GRE book says: A candidate who gets 30 percent marks in an examination fails by 30 marks,but another candidate who gets 42 percent marks get 42 more marks than necessary for ...
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1answer
12 views

Compare sales growth

So I’m trying to measure the sales growth of specific salesman. Any salesman has the highest sales growth (min $4\%$) will receive a giftcard. However I found it not fair to compare when a saleman ...
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1answer
17 views

How to figure out a formula for percentage?

Let's say I want to go shopping and all I have is $15.00. The rate that I will be taxed at, on my purchases is 8.25%. I would like to know the formula to figure out what I can spend, less the ...
0
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1answer
41 views

Why does increasing a number by 15% and then decreasing it by 15% fail to produce the original number?

I start with number: $.425$ and I want to add $15\%$ to get a new number. $.425 \times 1.15 = .489$ However, when I reduce $.489$ by $15\%$ I don't arrive back at $.425$. $.489 \times .85 = .416$. I ...
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3answers
48 views

How to compute Final Grade with assignment weightings?

I have just finished the Final for my Computer Hardware course, and I'm trying to figure out where my grade currently stands. The way the class is broken up is 50% weight for the homework, 25% for the ...
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1answer
17 views

The Car's cost is 9,00,000 and it is inclusive of local tax of 2%. How to find the original value of car?

The Car's cost is 9,00,000 and it is inclusive of local tax of 2%. How to find the original value of car? As far as calculation goes I calculated it as below 2% of 9,00,000 is 18,000 Final ...
0
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1answer
8 views

percentage including money and profit

I bought a bike for 30 Euro, the next day I sold the bike for 250 Euro, What percentage profit did I make in percentage? my friend say that he got for his answer 733,3 percent but I said that I got 73 ...
1
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6answers
64 views

Subtracting 30 percent of which number gives 2000?

Subtracting $30$ percent of which number leads to $2000$? $$x - (30 \text{ percent of }x) = 2000$$ for example: $$4000 - (50\text{ percent of }4000) = 2000$$
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1answer
18 views

Complex percentage [closed]

I am trying to create a companion app for a game made by a group of indie developers. I have to calculate the probability that a player obtains a certain item. I know that you have a 7.80% to find ...
0
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1answer
15 views

Matlab %e meaning

What does %e mean in matlab? I.e: x = %1.25e I know if you put an e at the end it adds 0s, so does it have something to do with that?
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1answer
37 views

7th grade percentage question

In the year $2010$, John's monthly salary was $\$3500$. John's monthly salary in $2010$ was $25\%$ more than it was in $2009$. Calculate his monthly salary in $2009$. Many of us debated the answer ...