Percentage Calculator
Percentage calculator
To find a percentage of a number, multiply by the percent and divide by 100 (20% of 150 = 30). To find what percent one number is of another, divide and multiply by 100. Use the three calculators below for each common case — they update as you type.
What is % of ? =
is what % of ? =
% change from to =
Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. 20% of 150 = 150 × 20 ÷ 100 = 30.
What percentage is one number of another?
Divide the first by the second and ×100. 30 is what percent of 150? 30 ÷ 150 × 100 = 20%.
How do I calculate percentage change?
(new − old) ÷ old × 100. From 150 to 180 = (180 − 150) ÷ 150 × 100 = 20% increase.