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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Calculate opposite percentage of summed values
Right, sorry if the title makes no sense, I severely lack math terms, but will try to explain best I can!
I have a passion for soccer rating systems, so I'm trying to assign ratings to teams based on the number of goals they have scored / conceded…
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Formula for conversion scale starting from 1 to percentages.
so my question is.
I have a scale ranging from 1 to 7 points. With 1 point beeing the worst and 7 points beeing the best. I need to convert this scale to percentages. E.g. 1 is 0%, and 7 is 100%
Can anybody help me out with the formula for coversion…
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SAT graph and table interpretation problem
https://i.stack.imgur.com/ApUsk.jpg
14) Answer is B.
this was my thought process:
It says 30% of the "1-3 Days group" which to me means we want to take 30% of 77. 30% of 77 = 23.1, this number is the total number that should be then redistributed…
Arcuvia
- 21
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2 answers
How can I calculate a commitment volume by days rate?
I am not sure what the name of the formula I am searching for is. I normally focus on coding sites but since this is a math question I figured this is the best place to ask.
I have a problem where I am trying to identify the sell through rate of…
Jeremy
- 103
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How to find net loss or gain on the sale of all the particles
A man sells three articles A, B, C and gains 10% on A, 20% on B and loses 10% on C. He breaks even when combined selling prices of A and C are considered, whereas he gains 5% when combined selling prices of B and C are considered. What is his net…
Mini_me
- 2,165
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1 answer
How much old water do I have?
Assume I fill up a 1-liter bottle of water to the brim.
The next day, I empty $\frac 34$th of the bottle, and fill with fresh water until the bottle is full. I shake the bottle thoroughly to mix the water.
The next day, I again empty $\frac 34$th of…
coldspeed
- 123
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2 answers
What is the maximum potential error in terms of percentage?
A pharmacist attempts to weigh 120mg of codeine sulphate on a balance with a sensitivity requirement of 6mg. Calculate the maximum potential error in terms of percentage.
The answer is 5%. Please do show the solution. Thanks!
Dany Rys
- 17
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How to reverse added percentage to a number
Firstly sorry for my bad English.
Assume I have some values like this:
109
5450
926500
etc...
I know all of these values already added with 9% like this :
100 + 9 (9 is 9% of 100) = 109
5000 + 450 (450 is 9% of 5000) =…
Hamed Kamrava
- 373
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2 answers
How do you calculate it?
A factory manufactures products in two grades of quality. 90% of its revenues comes from manufacturing the first-rate product. How will the revenues change if production of the first-rate product is increased by 10% while the production of…
maki
- 213
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Simple percentage ratio question using cacao percentages
I have two dark chocolate bars, one has 55% cacao, the other 80%. I want to eat 20g of the 80%, then $x$ amount of the 55% bar that would have the same amount of cacao as the 20g of the 80% bar. I'm stumped.
I'm guessing that the ratio between 55%…
147pm
- 920
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X plus minus 10 percent.
I have $x = 100$. I need to get a range that is plus/minus $10\%$ of $100$.
That means in my case $x=100$:
$10\%$ of $100$ = $10$
$100 - 10 = 90$
$100 + 10 = 110$
That means my range of $100 \pm 10\%$ is: $90 - 110$
Correct?
user2818430
- 123
0
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1 answer
How to calculate the percentage here?
I have a very very simple question, it relate to physics also
Assuming we have a device with efficiency 85%, how much should be the input power to achieve 100W power in the output?
Here is my problem:
Some people say you have to multiple 100, 1.15…
M.A.K
- 111
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0 answers
Percentage Scaling
I am looking at player win percentages for example:
Name Race_Count Win_Count Win_Percentage
Player A 53 5 0.094 %
Player B 47 9 0.191 %
Player C 3 1 …
RWilson
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- 1
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Finding the percentage increase in the price of a share
At the close of one business day, a company's stock was trading at $\$24$ a share.
At the close of the next business day, the stock was trading at $\$27$ a share.
Find the percent of increase.
user1792
- 3
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2 answers
Calculating percentage change from loss and gain
A bank makes a loss of $1,000,000$ in $2016$. In $2017$ it makes a profit of $1,000,000.$ Is it possible to calculate the increase in percentage profit from $2016$ to $2017$
