Math
Percentage Calculator
Calculate percentages easily. Find what percent of a number, percentage of a value, or percent change.
What is X% of Y?
What is
% of
?
Formula
Percentage = (Part / Whole) × 100
How It Works
This calculator solves three common percentage problems:
1. What is X% of Y? - Multiply Y by X/100
2. X is what % of Y? - Divide X by Y, multiply by 100
3. % change from X to Y - ((Y-X)/X) × 100
Percentages are used everywhere: discounts, tips, grades, statistics, and more.
Frequently Asked Questions
How do I calculate a percentage?
To find X% of a number, multiply the number by X and divide by 100. Example: 25% of 80 = 80 × 0.25 = 20
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. Example: 25 is what % of 100? → 25/100 × 100 = 25%
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