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Lets say we have the number 500 and we want to find 50% of this number, this is easy to to in your head so i'm using an easy number so you see how the equation works.

you simply divide the number you have by 100 (converting it into a percentage) then multiply it by the percentage you want to know

500/100=5

5*50=250, so 50% of 500 is 250.

quantity/100*percentage value.

If you have a percentage of a number and you want to know what number that percentage is of a quantity you do (sticking with the same numbers):

50%/100*500=250

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Q: How do you find the percent of a number when the percent is unknown?
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