Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [percentages]

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.

0
votes
1answer
5 views

Computing for a number using two different percentage category.

I've come across a government document on a profile of a city, and have been curios to how to solve for this or if there's already a named formula for it. City X Land Area: 49800 ha . Alienable ...
-1
votes
1answer
13 views

How do I convert fraction percentage into mixed fraction?

I know how to convert a fraction into decimal but I want to make my calculation faster so I want to learn how to convert between fractions and percentage. I found this on a book: ...
0
votes
1answer
27 views

Simple percentage problem driving me crazy

Ok, so lets say to board a cruise ship it would usually take $60$ to $90$ minutes. Now it takes only $10$ minutes. In percentages this is: $60-10 = \frac{50}{60} = 83.3\%$ reduction (ie. from $60$ ...
-1
votes
2answers
58 views

Upvotes and downvotes problematic. [on hold]

I just questioned myself this: Given that I have on a reddit post: $5$ net upvotes $65\%$ upvote ratio. How many upvotes and downvotes do I have in total?. I think its solvable, but after some ...
0
votes
2answers
30 views

Word Problem - what percent of the women who apply are hired?

At a certain factory, twice as many men as women apply for work. If 5% of the people who apply are hired and 3% of the men who apply are hired, what percent of the women who apply are hired?
-1
votes
1answer
21 views

How to calculate obtaion and total marks from percentage [cgpa & percentage is given]

I got CGPA 3.69 out of 4.00 and i have percentage of each subject like Subject | Percentage | CGPA subject 1 | 88.61% | 3.72 subject 2 | 73.31% |3.26 but i have't total ...
0
votes
1answer
30 views

How would I avoid a condition in a formula?

Im currently writing an assignment in my math class. I have to calculate the amount of money an individual pays in taxes, based on his income. Where I live (Denmark), if you earn more than 500.000DKK ...
0
votes
2answers
18 views

Finding the total using only the value and percentage?

I've tried my best to google this, but I cannot seem to google it correctly or it's just not something people use that often. I'm trying to essentially solve for X if the equation is: 80=80% of ...
-2
votes
1answer
72 views

What is 4 divided by 6? [closed]

I had some difficulty , with this problem in class yesterday. I don't know where to begin with. Thanks
-2
votes
1answer
29 views

What percentage should be removed? [closed]

The price in the shop is $ 20 by how much % you how to reduce the price to get 15 So 20= to 100%. if you take away 20 from 15 you get 5 So if you take 100-5 =95 So is it 95% if it is wrong explain ...
0
votes
1answer
42 views

inverse percent (% ^ -1) units symbol

I have a graph showing bias and sensitivity of a psychometric curve (specifically, as logistic function of the form $\frac{1}{1+\exp(k(x-x_0))}$ , with $k$ = sensitivity and $x_0$ = bias). I am ...
1
vote
2answers
28 views

Cumulative Percentage Loss

I wondered if anybody knew how to calculate a percentage loss/gain of a process over time? Suppose for example Factory A conducted activity over 6 periods. In t-5, utilisation of resources was: 80% ...
1
vote
3answers
67 views

How to get an accurate result in the following problem?

I just wanted to know simple how many percent 1.7 is smaller than 1.9 (and vice versa). What I did is: $\frac{1.7\cdot100}{1.9}= 89.4736842105$.. It means that 1.7 is smaller than 1.9 in 10.5263157895%...
3
votes
0answers
36 views

Decoding confidential numbers expressed as percentages using number theory

This is a actual problem I encountered at work. Little long as it requires some explanation Let $n_1, n_2, \ldots n_k$ be natural numbers and let $s$ be their sum. The expressed as a percentage, the ...
0
votes
1answer
26 views

Negative percent below 100%

Maybe this is a dumb question, but is it valid to have a negative percent below -100% when comparing two quantities? I'm evaluating the Net Present Value of an investing project affected by many ...
1
vote
1answer
53 views

I tried answering this question but my answer is in decimal. How can a number of muffin be in decimal?

Mrs Ho baked a total of 60 banana muffins and chocolate muffins. After she gave away 5/7 of the banana muffins and 1/2 of the chocolate muffins, she had twice as many as chocolate muffins as banana ...
0
votes
2answers
23 views

Formula to to calculate number of combinations?

I'm trying to find a formula for counting number combinations in a set. For example: how many ways can 4 numbers, each between 1 and 6, be added together to get the sum of 16? I apologize if I am not ...
1
vote
1answer
28 views

Probability based on a percentage

We have a group of 15 people, 7 men and 8 women. Randomly selecting 5 people, what's the probability to pick 3 men and 2 women? What's the probability to pick at least 1 man? I tried solving the ...
0
votes
1answer
25 views

Fitting a logarithmic trendline on already logged values

This is the situation. I am running trials with a population simulator, which produces various outputs, with the variance of these outputs being dependent on the number of clones (recursions) the ...
1
vote
0answers
18 views

Calculate weighted percentages to incorporate discounts

I apologize if I have titled this question incorrectly. I am selling products online. Customers can purchase the products plain, or they can purchase it with one of two logo design applications, ...
0
votes
1answer
33 views

Calculate percentage of a value between two numbers

I am wanting to know the formula of calculating the percentage of a value between two numbers, for example -65dBm is 100% signal and -93dBm is 0% signal. I'd like to know the formula of a value ...
0
votes
1answer
30 views

Chances of winning a raffle

If there are 75 tickets and one 1st prize the chance is 1/75 x 100 in percentage terms. If the number of tickets doubles to 150 but there are now two 1st prizes (first 2 tickets drawn) do the odds of ...
0
votes
0answers
12 views

What does it mean to find percent difference when two values are equivalent?

I was asked to find the percent difference of two values (.381 and .119). To solve, I used the equation: $amount$ $of$ $increase$ $or$ $decrease$/ $original$ $amount$ Where my answer is 220%, which ...
0
votes
0answers
12 views

Finding region of maximum efficacy

I am using Microsoft Excel to plot data. Basically, I have three sample types A , B and C of which two test were preformed with each sample. When plotting I have plotted the results with test 1 and ...
0
votes
3answers
52 views

Rolling multiple 10-sided dice or a single die + a modifier

If you have the option to roll 2 separate 10-sided dice or a single 10-sided die that you add 2 to the result with a goal of at least one die getting a specific number or higher (say 6 for the ...
7
votes
7answers
1k views

Calculating discount not working

To increase a number by a percentage I was taught the formula no x 1.percentage, so for example: ...
0
votes
1answer
12 views

How to calculate the success rate against non-occurring events?

I am calculating a football team's success rate ofShots Savedagainst the opposition'sShots On Targetfor every match. It's very ...
0
votes
1answer
13 views

profits increase between 1991 and 1993

"What was the percent increase in profits for Company X between 1991 and 1993?" does this question mean that we need to calculate the 1992 profit increase as well? I am unable to comprehend what does ...
0
votes
1answer
29 views

How do percentage discounts combine?

Say a sandwich is made of one slice of cheese, three slices of ham, and two slices of bread, and that cheese is X% off, ham is Y% off,and bread is Z% off. I don't know what the actual price of ...
0
votes
1answer
16 views

Statistical Accuracy

I was reading about statistical filters, and I came across a sentence that I didn't understand: You might be thinking that there's not much difference between 95 percent and 99.5 percent. But you ...
0
votes
2answers
28 views

Logarithmic commission?

Let's say that I have a product which combines of two elements. I want to set my profit margin based on each element's part. Together both elements sum up to 100% I would like to charge more ...
0
votes
0answers
30 views

Calculating Percent Difference with zero and near zero values

I'm trying to calculate the percent difference between an expected measurement and the actual measurement. I'm using the formula ...
-2
votes
1answer
28 views

Working out how much time has increased by in % [closed]

I have two time values: Previous 3d 5h Now 5d 7h How can I work out how much it has changed by in terms of percentage. Thanks
0
votes
1answer
27 views

% success of individual groups vs % of total successes

Edited to 8 testers (not 9) I feel like this is probably an extremely easy question but I am unable to articulate my question to google to find an answer. Basically, referring to the image below, ...
2
votes
1answer
28 views

Problem of percentages [closed]

Can someone explain why: 100% of 10 = 10% of 100 or 78% of 5 = 5% of 78 Open to any explanations of this
1
vote
2answers
36 views

In an election there are 1080 votes, 5 electoral candidates but only 3 available seats. Calculate minimum number of votes needed to guarantee a seat.

I've received this grade school math problem but unfortunately algebra cannot be used. I am somewhat stumped and not convinced with my own answers. Here goes: At a grade school election, there were ...
0
votes
1answer
18 views

Calculate what the new number should be

If I know that the price for a particular product is $1750 WITH a 35% discount How can I found out what was the original price? This is probably a simple answer but I i have tried getting 35% and ...
1
vote
1answer
42 views

Stupid question but unsure on Regression.

When I want to do a regression between daily change of currency prices and a daily stock index changes which one shall I use as the dependent and independent variable. Thanks for any help.
0
votes
1answer
21 views

Sample points logarithmically between a a range of y values

I'm sorry if this a simple question but I couldn't understand the math from example graphs I read online. Example numbers to make this easier: Assume x = 0 to k (but let's assume k = 20) Assume y ...
0
votes
0answers
15 views

NCAA Bracket Odds of 2 Separate Occurrences Happening.

Ok so i'm trying to do some NCAA bracket odds and I have 6 separate things that have a certain percent chance of happening. The percentages are: ...
0
votes
1answer
26 views

How to get probability for “at least one” from multiple different percentages

I am trying to figure out some odds for a march madness bracket and I got stuck. I have a list of 6 things that could happen and each of them have different odds of happening (ranging from 85%-3%). I ...
0
votes
1answer
27 views

weight of ideal soil (given 2 different densities)

QUESTION - What is the total weight, in pounds, of $1$ cubic meter of an ideal soil including the soil solution. You can assume that the particle density of the soil solids = $2.65$ Mg/cubic meter and ...
50
votes
14answers
4k views

Is the percentage symbol a constant?

Isn't the percentage symbol actually just a constant with the value $0.01$? As in $$ 15\% = 15 \times \% = 15 \times 0.01 = 0.15. $$ Isn't every unit actually just a constant? But why do we treat ...
0
votes
0answers
33 views

How to divide a number per zero using another informations

everyone is well? My background for this questions is: I have a number of sent files, also I have a number of expectedly sendt files and finally the percentage of files, so I have: sent/expected (...
0
votes
1answer
20 views

Formula for contamination scoring system

I am trying to create a scoring system to show how contaminated a sample is.My aim is for the formula to yield one overall score, to indicate how "concerning" a sample is, i.e. the more it is ...
0
votes
1answer
26 views

Percentage split among years

Someone tells that over the next 10 years the value of a house will lose 13%. So if the value is 10000 now, the value after 10 years will be 8700. Now I want to generate the following table ...
0
votes
3answers
84 views

Is “30 times more likely” equivalent to a “3000% greater probability”?

I am trying to make a persuasive point based on facts and would like to be most accurate / clear in my point. Would "30 times more likely" be equivalent to a 3000% greater probability"
3
votes
2answers
46 views

A is x% more than B

I am taking the AMC10 test, and I don’t want to lose points on silly misunderstandings. When a question says “A is x% greater/less than B”, or things like that sometimes with money, which respect ...
0
votes
0answers
19 views

That is the value of an annuity?

The person is gaining $1000 $ on the 1st day of every month (annuity) from 2015.12 till 2018.05.31, but 2015.12 the person wants to get $1000 $ twice - on the 1st and on the 15th day of December. Find ...
0
votes
1answer
29 views

Percentage of Common [closed]

How can I calculate the percentage of in this case If 120 things are common between 149 and 160. what would be percentage of common things? I calculated it like this 120*100(120+(149-120)+(160-120))= ...