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.
Questions tagged [percentages]
1440 questions
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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 taxes, so it will equal or come the closest to the $15…
kaitara
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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 percent, who is right?
narcis
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Calculating percentage change. Using average or endpoint values?
I have always been taught that when I need to find the percentage change of a value I should do
$$
ΔX = \frac{X_{new}-X_{old}}{X_{old}} * 100\%
$$
Yesterday however I was reading on price elasticity of demand and I came across the following
$$
η =…
Constantine Loukas
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What equation do I have to put here to have an accurate increase of 4.7% every year?
I'm dragging this question over from another website from a recommendation.
I'm writing a program in BlueJ that gets the starting price of Tuition in the first year ($8000) and for each year afterwards the price raises by 4.7%.
public class…
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Conversion into percentage
I have a very basic algo wherein each person gives an opinion about an article which has a score. All opinions add up points to the article score. For example, If person says I like it, article gets 5 points and likewise, -5 for dislike. In addition…
Mark
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What's the percent of mango trees?
I know this is simple stuff compare to the questions I've seen on this site but please be nice. :) Would be great if anyone could show me how to solve the problem below.
Question:
On a piece of land, 3/8 of the trees are lemon trees. Of the other…
Lattja
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How can I scale up a number to be the same percentage of another number?
I would like to scale up a number to always be the same percentage of a bigger number, if you get what I mean.
I am making a start screen for my game, and basically I need the buttons to always be the same no matter what size the user has.
So for…
user2722083
- 349
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Average of percentages
I have a simple scenario as follows:
If 12% of people buy a new computer each year, 33% of people buy shoes each year, and 39% of people buy a new phone each year, what percentage of people on average buy at least one of those products each year?
Is…
SR.
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"reverse" percentage (go backward instead of forward)
I'm a bit stuck with calculations to my program here..
This is how it works today:
http://dropthebit.com/demos/pathAnimator/index.html
The object goes along the path, which the default is "forward", in a given time T and there are calculations…
vsync
- 101
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Simple percentage calculation
This is an easy question, but since I grew dumb in the years, I ask for your help! :)
A = 50%
B = 75%
C = 100%
D = 125%
E = 150%
How can I calculate the value of any of these letters? I'm making a dopesheet and the more I think the more confused I…
ToXiN
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Black or red percentages
Black or Red. With a $\$100.00$ bankroll I want to increase to $\$200.00$. To achieve my goal what type of bet should I make. Would I be best to make only 1 bet ($\$100.00$) or 2 bets ($\$50.00$)each or 4 bets($\$25.00$) each. How will the number of…
Joe B
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Calculation of approval rates
Total requests=100
Requests Approved=25
Requests Pending=65
Requests Rejected=5
So how to calculate the percentage of approval?? Can someone help please..
rahul
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What is the correct percent difference formula?
While googling for percent difference formulas, I got two different formulas:
(difference/old-value)$\times 100$.
(difference/average)$\times 100$.
So, for $6$ and $9$, the first one gives $-33$ and the second gives $-40$. Which one is correct…
TheOne
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Unable to determine 'original amount' in simple percentage problems
I'm solving a problem in the Manhattan GRE 5 pound book.
When Mark fills his car with regular gasoline, he gets 20 miles/gallon. When he fills his car with premium
gasoline, he gets 25 miles/gallon. If the price of regular gasoline is \$4.00 per…
anon_16
- 147
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Why there is no pattern between a fractional growth rate and a unit-multiplied growth rate?
For example, when increasing $20$ by $75\%$, we add $75\%$ of $20$, to $20$. But, why when we increase $20$ by $200\%$, we don't add $200\%$ of $20$, to $20$? (Or, do we?)
Due to this inconsistency, it almost makes me feel like this procedure was…
