# 21 is what percent of 27?

Answer: 21 is 77.778 percent of 27

## Fastest method for calculating 21 is what percent of 27

Assume the unknown value is 'Y', and 21 of 27 can be written as:

Y = 21 / 27

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

Y = 21 / 27 x 100 / 100 = 77.778 / 100

Y = 77.778%

Answer: 21 is 77.778 percent of 27

If you want to use a calculator, simply enter 21÷27x100 and you will get your answer which is 77.778

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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% / 27 = Y% / 21

Drop the percentage marks to simplify your calculations: 100 / 27 = Y / 21

Multiply both sides by 21 to isolate Y on the right side of the equation: 21 ( 100 / 27 ) = Y

Computing the left side, we get: 77.778 = Y

This leaves us with our final answer: 21 is 77.778 percent of 27