Calculate percentages, percentage increases, decreases, changes, discounts and more. Choose a calculation, enter your numbers and get an instant result.
How to Calculate Percentages
A percentage expresses a number as a fraction of 100. The basic percentage calculation multiplies a ratio by 100.
| Calculation | Formula | Example |
|---|---|---|
| Percentage of a number | X / 100 x Y | 25% of 200 = 50 |
| Find the percentage | X / Y x 100 | 25 is 25% of 100 |
| Percentage increase | (New - Original) / Original x 100 | 100 to 125 = 25% increase |
| Percentage decrease | (Original - New) / Original x 100 | 100 to 75 = 25% decrease |
| Discount | Price x Discount / 100 | 20% off 100 = 80 |
Percentage Increase vs Percentage Change
Percentage change compares a new value with an original value. A positive result indicates an increase, while a negative result indicates a decrease.
For example, if a value rises from 100 to 125, the change is 25. Dividing 25 by the original 100 and multiplying by 100 gives a 25% increase.
Frequently Asked Questions
20% of 150 is 30. The calculation is 20 / 100 x 150 = 30.
Divide the first number by the second number and multiply the result by 100. For example, 25 is 25% of 100.
Subtract the original value from the new value, divide the difference by the original value, then multiply by 100.
Subtract the new value from the original value, divide by the original value, then multiply by 100.
Multiply the original price by the discount percentage divided by 100. Subtract the discount amount from the original price to get the final price.
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