# What is 40 percent of 30 (40% of 30)?

Answer: 40 percent of 30 is 12

## Fastest method for calculating 40 percent of 30 (40% of 30)

Assume the unknown value is 'Y'

Y = 40 / 100

Y = 40 / 100 x 30

Y = 12

Answer: 40 percent of 30 is 12

If you want to use a calculator, simply enter 40÷100x30 and you will get your answer which is 12

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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% / 30 = 40% / Y

Drop the percentage marks to simplify your calculations: 100 / 30 = 40 / Y

Multiply both sides by Y to transfer it on the left side of the equation: Y ( 100 / 30 ) = 40

To isolate Y, multiply both sides by 30 / 100, we will have: Y = 40 ( 30 / 100 )

Computing the right side, we get: Y = 12

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