How to Calculate a Percentage
Percentages are used for discounts, grades, statistics, business calculations, and everyday comparisons. The basic idea is that a percentage expresses a number as a part of 100.
The basic percentage formula
To find a percentage of a number, multiply the number by the percentage and divide by 100.
Formula: result = number × percentage ÷ 100
Example
To calculate 15% of 200, multiply 200 by 15 and divide by 100. The result is 30.
Where percentages are useful
- Calculating discounts
- Comparing changes in prices
- Checking test scores
- Understanding business metrics
- Working with statistics
Calculate a percentage online
For quick calculations, use the free Percentage Calculator. Enter the number and percentage and get the result instantly.
Percentage versus percentage points
A percentage describes a relative amount, while a percentage point describes the direct difference between two percentages. For example, moving from 20% to 25% is a 5 percentage-point increase.
Frequently asked questions
What is 10% of a number?
Divide the number by 10. For example, 10% of 80 is 8.
Can percentages be greater than 100?
Yes. A percentage above 100% means the amount is greater than the reference amount.