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.

learn more… | top users | synonyms

0
votes
1answer
32 views

How to calculate a weighted final grade that is not out of $100\%$

I took a professor that graded his class based on weights and not points but the class weight percentages only added up to $70\%$ not $100\%$. Below is my grades: Quiz $10\%$ weight $\dfrac{374}{384} ...
0
votes
0answers
7 views

Contribution percentage of terms in a multiplication

I have the following measured in two different moments (i - for initial and f - for final) $ A = B \times C $ For any variable X, I have: $\Delta X = X_{f}/X_{i}-1 $ Now what I would like to do is ...
-1
votes
0answers
11 views

Equation for percentage increase needed to equal overall percentage of classes

I have two classes: a and b. For arguments sake, the overall number of a's and b's is 100. So there are 10 A's, and 90 B's. What equation can be used, to find out the percentage increase needed for ...
0
votes
0answers
17 views

Adding up percentage point contributions to a percentage change

In the constructed example below how would I work out the percentage point (ppt) contributions of factors A and B to growth of the main series between periods 1 and 5? ...
0
votes
0answers
32 views

How to calculate a group percentage?

In a classroom, there are 8 desks equally arranged in two columns (i.e. each column has four desks). Each desk can accommodate 2 people and there are eight boys and eight girls in total. When two ...
0
votes
1answer
14 views

Taxes calculations on goods: there is something I'm missing

Lets say I have a good that costs 1000 Eur including taxes and that the applied tax rate is 22%. ...
0
votes
1answer
25 views

Constant difference between two percentage numbers (nonlinear)

I'm trying to figure out the correct way of detecting the difference of values based on two percentages, because my terminology is poor here is an example: The difference between two values where ...
0
votes
1answer
20 views

Calculating percentage based on an average percentage

This is a typical question a student at any Business School have to deal with during the test. Could you please give me insight on how to solve it. What area of study should I invest in? A student ...
1
vote
1answer
20 views

If this pattern continues what will the balance be in January 2017?

If this pattern continues what will the balance be in January 2017? I noticed every month there's a higher percentage increase but don't know how to calculate. Thank you! january- 25.29$ Feb- ...
0
votes
0answers
5 views

Average discount give for product line

I have been out of school for entirely too long to remember how to build this equation. I am trying to calculate the average discount given for our entire product line, that is sold over 4 distinct ...
-1
votes
3answers
19 views

Find source from percentage number

Yeah, I might look stupid with this question but Math classes are so long ago for me :). I need to find the exact number that makes 18.20, ...
0
votes
0answers
13 views

Is it possible to transform different interest rates (applied over different times) into one interest rate?

I have a fixed income asset that has the following payment schedule. Is it possible to transform the multiple interest rates being applied to different periods into one interest rate and one period? I ...
0
votes
1answer
10 views

How to calculate percentage based alignment

Ok, first a little explanation of concept and rules: Let's say we have a container and an image. Now if we define a percentage, the percentage of the image is aligned to the percentage of the ...
1
vote
2answers
21 views

Find price without VAT from price with VAT and VAT rate

I need to calculate what number my number was before it had added percentages. I have a price including VAT, and I need to find out what to price was before VAT. In Denmark our VAT Rate is $25\%$; ...
0
votes
0answers
12 views

How to Calculate Item Discount for Packet containing 3 sheet

I have some products (packets) that contain (Sheets) for example: Product A (Unit: Packet, Packet = 5 Sheet), when I sell one packet and 2 sheet of this product, then: Total = Packet Price + (Number ...
1
vote
1answer
26 views

Finding percentage when infinity is involved

Is it possible to convert a function of the form $f(x)=ax/(a-x)$ to a form where you can find $f(x)/f(a)$? I'd like to find the percentage of $f(a)$ for $f(x)$ but this seems impossible while $f(a)$ ...
1
vote
2answers
20 views

What *is* percentage difference?

I'm trying to calculate the percentage difference $\Bbb{P}$ between two numbers, $x$ and $y$. I'm not given much context about how these numbers are different (for example, if one is "expected ...
-1
votes
1answer
22 views

How to calculate the percentage between two numbers? [closed]

Assiming the firt is always the bigger one and the second is the smallest how to calculate the percentage between them, ex: 100, 25 = 25% thanks
0
votes
0answers
23 views

Convert log percentage to linear percentage

I am being provided some numbers in computer code between 0 and 1 that represent a percentage of a base 10 log scale that I need converted to a linear percentage. For example the 50% number for the ...
0
votes
1answer
10 views

Percent comparison

I have a frequency list of words. This list was generated using 1,000,000 words. I want to compare how much more word 1 occurs compared to word 2. For example, The word "he" shows up 20000 times The ...
1
vote
0answers
31 views

How to find $x$ out $x\%100+x\%(x\%100)+x\%(x\%(x\%100))…=a$?

$$x\%100+x\%(x\%100)+x\%(x\%(x\%100))...=a$$ It repeats $b$ times. $a$ is known. $b$ is known. How to find $x$? I am not sure I formatted right, so I note that $x\%100$ means $x$ percent of $100$. ...
0
votes
0answers
20 views

Need help with weighted grades calculation

I can't quite see how to solve this, so help will be appreciated. I want to see if I can ever recover from this situation and what my final projected grade could be based on this. I list my grade in ...
0
votes
1answer
17 views

Probability of that an action unit backs to it's original price in 6 days

Each day the price of a particular stock rises or falls, the probability of the price up is 3/4 and 1/4 the probability that the price down , What is the probability that in six days the action back ...
1
vote
0answers
20 views

Sequence of percentages with corresponding video retention periods

I couldn't think of a better title so I do apologize if it is misleading, but my question is this: ...
0
votes
1answer
20 views

Questions based on ratio and percentage

Out of $5$ questions given in a question paper, $1/20$th of examinees answered all questions and $1/20$th answered none. $1/4$th and $1/5$th of the remaining examinees answered $4$ and $1$ questions, ...
0
votes
0answers
31 views

Minimum Percentage Error without any approximate values

Kelly knows she will take between $10$ and $12$ minutes (inclusive) to get ready for school. What is the least the percent error could be? Kate took a test and she got a grade between $80\%$ and ...
0
votes
1answer
14 views

Algorith/Method to determine if a percentage will be greater than fixed amount without knowing the final number.

If you are applying a discount to a price and you have two possible choices on the discount to apply, a percentage or a fixed amount, e.g. I could remove a fixed amount of 5 or I can remove a 20% of ...
0
votes
2answers
24 views

Increase in price by a percentage for values greater than $100%$

The price of a TV in 1970 increased by $300$% in 1980. The price of the 1980 model TV increased by $200$% in 1990. By what percentage did the price increase from 1970 to 1990? Can someone please ...
0
votes
1answer
44 views

Multiple percent calculations

I would like to ask trivial question about calculating percents. Problem appeared during accounting calculations. I've got $100$ Euro of Tax. There was a $10\%$ ratio which I was allowed to deduct ...
0
votes
2answers
25 views

How much water must be added to $10\%$ of $350\text{mL}$ alcohol to dilute it to $5\%$

You have $350$ml of cider, with a $10\%$ alcohol content. If you want to dilute the drink to end up with a $5\%$ alcohol content, how much water would you need to add?
0
votes
1answer
16 views

Lottery Payout Fun

I'm working on a lottery pay out mechanic for a game, and I'm not quite sure how to address multiple winners. The plan is that the players will always split the lottery earnings, but there are ...
0
votes
1answer
75 views

Find the percentage of occupied space of each object in a bag, where each object has a different value (unknown value, read more)

I don't know if there is an answer for this question, but I developed a smartphone application and my competitor do something that for me is not possibile.. so here's the question: I have a bag and ...
0
votes
1answer
17 views

Percentage and Mean

Okay, I wanna Calculate my grade in a class.Formative is worth 35% of the grade, Summative is 55% and Final exam is 10%. For formative, I have 86.3%. For summative, I have 68%. The final exam has not ...
0
votes
1answer
34 views

How do I convert a percentage from a 1%-100% scale to a different scale?

So if I have 9%, and this 9% fits in where 0 is the lowest and 100% is the highest, what would that 9% be if 25% is the lowest and 75% is the highest? What would the formula be to convert a ...
2
votes
2answers
54 views

Why does the difference between 150% and 120% equal 25%?

I am working through a math book and the question states: The cost of living in a city increased by 20% in the 10 years from 1980 to 1990 and by 50% from 1980 to 2000. What was the percent increase ...
1
vote
1answer
36 views

Relation between some numbers and some percentage. What does represent $25$ in percent value?

I have a question about percentage. If $0$ represents $10\%$ $15$ represents $100\%$ $30$ represents $200\%$ What does $25$ represent in percent value? I have obtained that $25$ represents ...
0
votes
0answers
19 views

Determine contribution percentage

I'm trying to determine the individual category percentages once their weights have been applied. The easiest way to describe what I'm asking is to show my workings: ...
-2
votes
1answer
16 views

Relative width of one image wrt another [closed]

Suppose I have an image: 120: Original Width 70: Original Height I have another image: ...
1
vote
0answers
23 views

How do i account for percentage change of group when items are added and removed?

How do i account for percentage change of group when items are added and removed? Original items = 50 (different items) Current items = 60 (different items) 30 of the original items remain 30 new ...
1
vote
3answers
80 views

The total amount Edgar paid for a slice of pizza and a tip of exactly $24\%$ was between $\$2.50$ and $\$3.00$. What was the price of the pizza slice?

The total amount Edgar paid for a slice of pizza and a tip of exactly 24% was between $\$2.50$ and $\$3.00$. What was the price of the pizza slice? Well, I did the trial and error method and ...
1
vote
1answer
19 views

Les say avg time to travel in train from NY to NJ is 75 mins

Les say avg time to travel in train from NY to NJ is 75 mins. Les say they get a faster train and they are 1000 times faster. What would be the new avg time to travel from NY to NJ? I got 75 / ...
1
vote
2answers
35 views

Formula to get percentage from a target, start, and current numbers

I have 3 numbers: start = 0; current = 4; target = 10; I want to figure out how far along current is in the percentage from ...
2
votes
0answers
14 views

How To Correctly Calculates Time Achievement Performance

Please kindly help. Our organization measure employee performance of time achievement with this formula: Eficiency of time is calculated by: $[(TargetTime - TimeDone) / TargetTime] * 100%$ So, ...
0
votes
0answers
29 views

Percents question [duplicate]

A vacuum is priced at \$$340$ with an allowed trade-in of \$$135$ on an old unit. If the sales tax of $4$ $3/4$% is charged on the price of the new vacuum unit before the trade-in, find the total cost ...
-1
votes
1answer
32 views

Percent story problem [closed]

A vacuum is priced at \$$340$ with an allowed trade-in of \$$135$ on an old unit. If the sales tax of $4$ $3/4$% is charged on the price of the new vacuum unit before the trade-in, find the total cost ...
0
votes
1answer
33 views

Clarification about percentage calculus

Why if we want to know what percentage of 16 is 4 we do 4/16 and not 16/4 ? 4/16 gives you the answer, because it's ...
0
votes
2answers
20 views

Percentage of All

2% of children in PA have a developmental disability. Of these, 40% live below the poverty line. In comparison, only 35% of children without a developmental disability live below the poverty line. ...
1
vote
0answers
13 views

Do I need to calculate the weighted average in these cases?

I'm aware of the concept of calculating a weighted average but the data I'm working with is confusing me. I couldn't find any similar examples when I did a search. Here's an example. We have a number ...
3
votes
1answer
33 views

Basic Mathematics

Thanks for your help. I'm not too sure if this is the correct way to answer this question, but let me know! A student is having issues with an online computing grading system. The system is ...
1
vote
2answers
225 views

Weight of watermelons after percentage of water is evaporated.

A stock of watermelons of the initial weight of $500 \space\text{kg}$ has been put in a store for a week. Initially the percentage of water in the watermelons makes up $99 \% $ of the ...