Percentage Calculator
Calculate percentages quickly and easily. Use the calculators below to find percentages, percentage changes, increases, decreases and differences.
What is X% of Y?
Find a percentage of a number.
Please enter both values.
X is what percentage of Y?
Find what percentage one number is of another.
Please enter both values, and make sure the total is not zero.
Percentage increase or decrease
Find the percentage change between an original value and a new value.
Please enter both values, and make sure the original value is not zero.
Percentage difference
Find the percentage difference between two numbers.
Please enter two numbers that are not both zero.
How to calculate a percentage
A percentage expresses a number as a fraction of 100. To calculate a percentage of a number, divide the percentage by 100 and multiply it by the number.
Percentage of a number = (Percentage ÷ 100) × Number
For example, to calculate 15% of 250:
(15 ÷ 100) × 250 = 37.5
Therefore, 15% of 250 is 37.5.
How to calculate percentage increase or decrease
To calculate the percentage change between an original value and a new value, subtract the original value from the new value, divide the result by the original value, then multiply by 100.
Percentage change = ((New value − Original value) ÷ Original value) × 100
A positive result represents an increase, while a negative result represents a decrease.
How to calculate percentage difference
Percentage difference compares two values without treating either value as the original or starting value.
Percentage difference = |A − B| ÷ ((A + B) ÷ 2) × 100
This is useful when comparing two values where neither is considered the baseline.
Percentage examples
| Calculation | Answer |
|---|---|
| 10% of 100 | 10 |
| 15% of 250 | 37.5 |
| 30 is what percentage of 150? | 20% |
| 100 to 125 | 25% increase |
| 100 and 125 | 22.22% difference |
Frequently asked questions
How do I calculate a percentage?
Divide the percentage by 100 and multiply it by the number. For example, 20% of 150 is (20 ÷ 100) × 150 = 30.
What is 10% of 100?
10% of 100 is 10.
What is 25% of 200?
25% of 200 is 50.
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.
What is the difference between percentage change and percentage difference?
Percentage change uses an original value as the baseline. Percentage difference compares two values without treating either one as the starting point.