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# How do you figure a number from a percentage?

Updated: 12/18/2022

Wiki User

14y ago

I'm not sure what you're asking, but if you mean : given a number (lets say 100) find 25% of it.

For this, you could easily (since they are compatible) reduce it. 25% is equal to one fourth.

One fourth of 100 is 25.

If it is something like...10% of 30, DO NOT SAY IT IS 10. THE ANSWER IS NOT TEN.

Ten percent in decimal form (move the decimal over/left two spaces) is 0.1

0.1 multiplied by 30 is 3.

You could also use proportions, 10% = 1/10 simplified version of 10/100

the unknown number is the value out of 30. Use x as the variable.

The equation is 1/10=x/30 what you do is multiply across with the PRESENT numbers, then divide with the other one. Never multiply vertically or horizontally.

30x1=30 then 30\10 = 3

So, 10% of 30 is 3. (:

Secondly, if you have two numbers, like 50 and 100, and you need to find what percentage 50 is OF 100, you use proportions.

Since percentage is a number in a ratio to 100, it is a value over 100.

x/100=50/100

50x100 = 5000 5000/100=50

50/100 = 50%

Wiki User

14y ago