# 120 is 30 percent of what number?

Answer: 120 is 30 percent of 400

## Fastest method for calculating 120 is 30 percent of what number

Assume the unknown value is 'Y'

120 = 30% x Y

120 = 30 / 100 x Y

Multiplying both sides by 100 and dividing both sides of the equation by 30 we will arrive at:

Y = 3 x 100 / 30

Y = 400%

Answer: 120 is 30 percent of 400

If you want to use a calculator, simply enter 120x100÷30 and you will get your answer which is 400

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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% / Y = 30% / 120

Drop the percentage marks to simplify your calculations: 100 / Y = 30 / 120

Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 30 / 120 ) Y

Simplifying the right side, we get: 100 = 30 Y

Dividing both sides of the equation by 30, we will arrive at: 400 = Y

This leaves us with our final answer: 120 is 30 percent of 400