Percentage Calculator

Calculate percentages, what percent one number is of another, and more.

Result
30
X (percent)20
Y (value)150

Frequently Asked Questions

How do I calculate X% of a number?+

Divide the percentage by 100 and multiply by the number. For example, 20% of 150 is 20 ÷ 100 × 150 = 30. Use the 'What is X% of Y' mode for this.

How do I find what percent one number is of another?+

Divide the part by the whole and multiply by 100. For example, 30 out of 150 is 30 ÷ 150 × 100 = 20%. Use the 'X is what percent of Y' mode.

How do I calculate percentage increase or decrease?+

Subtract the old value from the new value, divide by the old value, and multiply by 100. Going from 100 to 125 is a 25% increase; from 200 to 150 is a 25% decrease. Use the 'Percent change' mode.