Percentage Calculator
Calculate percentages, percentage increases, decreases and more with our free online calculator.
What is X% of Y?
X is what percentage of Y?
Percentage Increase
Percentage Decrease
What Is a Percentage?
A percentage is a way of expressing a number as a fraction of 100. The word percentage means "per hundred." Percentages are commonly used in mathematics, finance, shopping, statistics, business and everyday calculations.
How to Calculate a Percentage
To calculate a percentage of a number, multiply the percentage by the number and divide the result by 100.
For example, 20% of 500 is:
20 × 500 ÷ 100 = 100
Percentage Increase Formula
Percentage increase can be calculated using the following formula:
Percentage Increase = ((New Value − Original Value) ÷ Original Value) × 100
Percentage Decrease Formula
Percentage decrease can be calculated using:
Percentage Decrease = ((Original Value − New Value) ÷ Original Value) × 100
Frequently Asked Questions
What is 20% of 500?
20% of 500 is 100.
How do I calculate percentage increase?
Subtract the original value from the new value, divide the result by the original value and multiply by 100.
Is this percentage calculator free?
Yes. Easy Online Tool provides this percentage calculator completely free to use.
Does the calculator work on mobile phones?
Yes. The calculator is designed to work on smartphones, tablets and desktop computers.
Learn More About Percentages
Want to learn how percentages are calculated? Read our detailed guide with formulas, examples, percentage increase and decrease methods:
How to Calculate a Percentage: Formula, Examples & Easy Methods
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Using the Percentage Calculator
This calculator provides several common percentage calculations in one place. You can find a percentage of a number, determine what percentage one number represents of another, and calculate percentage changes between two values.
Percentage Examples
If you want to find 15% of 200, enter 15 as the percentage and 200 as the number. The result is 30.
If a price changes from 100 to 120, the percentage increase is 20%. If a price changes from 200 to 150, the percentage decrease is 25%.
Common Uses of Percentages
Percentages are useful for calculating discounts, sales tax, tips, exam scores, business figures, price changes, statistics and many everyday calculations.
Important Note About Results
The results provided by this calculator are intended for general informational and educational purposes. For important financial, business or other decisions, verify calculations and consider advice from an appropriately qualified professional.