Percentage Calculator

Three common percentage questions, answered instantly. Fill in any one row.

What is % of ?

is what percent of ?

Percent change from to ?

How to calculate percentages

X% of a number: multiply the number by the percent, then divide by 100. So 15% of 80 = 80 × 15 ÷ 100 = 12.

A is what percent of B: divide A by B and multiply by 100. So 12 out of 48 = 12 ÷ 48 × 100 = 25%.

Percentage change: subtract the old value from the new value, divide by the old value, multiply by 100. From 200 to 250 = (250 − 200) ÷ 200 × 100 = +25%.

Frequently asked questions

How do I find the percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 20% of 150 is 150 × 20 ÷ 100 = 30.

How do I calculate percentage increase?

Subtract the original number from the new number, divide by the original number, then multiply by 100. A rise from 200 to 250 is a 25% increase.