About the Percentage Calculator
The Percentage Calculator handles the three questions people ask most: what is X% of a number, what percent one number is of another, and the percentage increase or decrease between two values.
All three work side by side and update live as you type, so you can answer any percentage question in seconds — right in your browser.
Worked examples: 20% of 150 is 30; 30 is 25% of 120; and a change from 100 to 125 is +25%. A decrease shows as a negative percentage.