# What is 90 percent of 40 (90% of 40)?

Answer: 90 percent of 40 is 36

## Fastest method for calculating 90 percent of 40 (90% of 40)

Assume the unknown value is 'Y'

Y = 90 / 100

Y = 90 / 100 x 40

Y = 36

Answer: 90 percent of 40 is 36

If you want to use a calculator, simply enter 90÷100x40 and you will get your answer which is 36

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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 = 90% / Y

Drop the percentage marks to simplify your calculations: 100 / 40 = 90 / Y

Multiply both sides by Y to transfer it on the left side of the equation: Y ( 100 / 40 ) = 90

To isolate Y, multiply both sides by 40 / 100, we will have: Y = 90 ( 40 / 100 )

Computing the right side, we get: Y = 36

This leaves us with our final answer: 90% of 40 is 36