# 12 is what percent of 40?

Answer: 12 is 30 percent of 40

## Fastest method for calculating 12 is what percent of 40

Assume the unknown value is 'Y', and 12 of 40 can be written as:

Y = 12 / 40

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

Y = 12 / 40 x 100 / 100 = 30 / 100

Y = 30%

Answer: 12 is 30 percent of 40

If you want to use a calculator, simply enter 12÷40x100 and you will get your answer which is 30

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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% / 40 = Y% / 12

Drop the percentage marks to simplify your calculations: 100 / 40 = Y / 12

Multiply both sides by 12 to isolate Y on the right side of the equation: 12 ( 100 / 40 ) = Y

Computing the left side, we get: 30 = Y

This leaves us with our final answer: 12 is 30 percent of 40