About the Percentage Calculator
A percentage calculator solves the three classic percent problems: X% of Y, X is what % of Y, and percent change from A to B. These operations appear in discounts, tips, grades, markups, tax, and growth rates.
Frequently asked questions
How do I calculate a percentage?
Multiply the base number by the percentage expressed as a decimal. 20% of 250 = 250 × 0.20 = 50.
What's the difference between percent change and percentage points?
A move from 10% to 15% is an increase of 5 percentage points, but a 50% relative increase. Confusing them changes the magnitude of a change by 10× in some cases.