How do you figure out 100 percent percent if 20 percent is known?

Answer 1

if you have the known value and know that it is 20% all you have to do is take 100 and divide it by 20 which equals 4. Then multiply your known value by the number 4 that you found by taking 100% and dividing it by the percentage of the known value.

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Unfortunately, 100/20 is 5, not 4!

So you need to multiply by 5.