# 45 is 80 percent of what number?

Answer: 45 is 80 percent of 56.25

## Fastest method for calculating 45 is 80 percent of what number

Assume the unknown value is 'Y'

45 = 80% x Y

45 = 80 / 100 x Y

Multiplying both sides by 100 and dividing both sides of the equation by 80 we will arrive at:

Y = 3 x 100 / 80

Y = 56.25%

Answer: 45 is 80 percent of 56.25

If you want to use a calculator, simply enter 45x100÷80 and you will get your answer which is 56.25

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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 = 80% / 45

Drop the percentage marks to simplify your calculations: 100 / Y = 80 / 45

Multiply both sides by Y to move Y on the right side of the equation: 100 = ( 80 / 45 ) Y

Simplifying the right side, we get: 100 = 80 Y

Dividing both sides of the equation by 80, we will arrive at: 56.25 = Y

This leaves us with our final answer: 45 is 80 percent of 56.25