Percentage Calculator
Calculate percentages instantly — percentage of a number, percentage change, increase, and decrease.
What is X% of Y?
Result
X is what % of Y?
Result
percent
Percentage Change from X to Y
Percentage Change
Increase/Decrease X by Y%
Result
How to Calculate Percentages
A percentage is a way of expressing a number as a fraction of 100. The word "percent" literally means "per hundred." Percentages are used everywhere — from shopping discounts and tax rates to statistics and data analysis.
Percentage = (Part / Whole) × 100
Part = (Percentage × Whole) / 100
% Change = ((New - Old) / |Old|) × 100
Part = (Percentage × Whole) / 100
% Change = ((New - Old) / |Old|) × 100
Common Percentage Conversions
| Fraction | Decimal | Percentage |
|---|---|---|
| 1/2 | 0.50 | 50% |
| 1/3 | 0.333 | 33.3% |
| 1/4 | 0.25 | 25% |
| 1/5 | 0.20 | 20% |
| 1/8 | 0.125 | 12.5% |
| 1/10 | 0.10 | 10% |