# 12 is what percent of 21?

Answer: 12 is 57.143 percent of 21

## Fastest method for calculating 12 is what percent of 21

Assume the unknown value is 'Y', and 12 of 21 can be written as:

Y = 12 / 21

By multiplying both numerator and denominator by 100 we will get:

Y = 12 / 21 x 100 / 100 = 57.143 / 100

Y = 57.143%

Answer: 12 is 57.143 percent of 21

If you want to use a calculator, simply enter 12÷21x100 and you will get your answer which is 57.143

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## Have time and want to learn the details?

Let's solve the equation for Y by first rewriting it as: 100% / 21 = Y% / 12

Drop the percentage marks to simplify your calculations: 100 / 21 = Y / 12

Multiply both sides by 12 to isolate Y on the right side of the equation: 12 ( 100 / 21 ) = Y

Computing the left side, we get: 57.143 = Y

This leaves us with our final answer: 12 is 57.143 percent of 21