Percentage Calculator
Calculate percentages, percentage increases and decreases, and find what percentage one number is of another.
Calculate a percentage
Select the type of percentage calculation you want to perform and enter your numbers below.
Your result
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Step-by-step calculation
What does a percentage mean?
A percentage expresses a number as a fraction of 100. The word percent means “per hundred.”
Percentages are commonly used to describe discounts, increases, decreases, proportions, statistics, interest rates, grades, and many everyday calculations.
How is a percentage calculated?
The calculation depends on the question you are trying to answer. For example, to find X% of a number, convert the percentage to a decimal and multiply it by the number.
To find what percentage one number represents of another, divide the first number by the second and multiply by 100.
Percentage calculator example
Suppose you want to find 20% of 150.
= (20 ÷ 100) × 150
= 0.20 × 150
= 30
Therefore, 20% of 150 is 30.
Formula used
Result = (X ÷ 100) × Y
X is what percentage of Y:
Percentage = (X ÷ Y) × 100
Percentage change:
Percentage Change = ((New Value − Original Value) ÷ Original Value) × 100
Percentage difference:
Percentage Difference = |A − B| ÷ ((A + B) ÷ 2) × 100
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Important: This calculator is provided for general informational and educational purposes only. The results are based on the numbers entered and the selected mathematical formula. Always check important calculations independently when accuracy is critical.