Percentage Calculator
Solve everyday percent problems in seconds: discounts, tips, grades and growth rates. Pick a mode, type two numbers, get the answer instantly.
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How to Use the Percentage Calculator
- Choose the calculation mode (percent of, what percent, or percent change).
- Enter the two numbers.
- Read the result — it updates as you type.
Common Percentage Calculations
- 20% of 150
- What percent is 30 of 200?
- Percent increase from 50 to 75
- 15% tip on $80
- 25% off $120
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Frequently Asked Questions
How do I calculate X percent of Y?
Multiply Y by X and divide by 100. For example, 20% of 150 is 150 × 20 ÷ 100 = 30. Select the “X% of Y” mode and the calculator does it for you.
How do I find what percent one number is of another?
Divide the first number by the second and multiply by 100. For example, 30 is 15% of 200 because 30 ÷ 200 × 100 = 15.
How do I calculate percent increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100. Going from 50 to 75 is a 50% increase.
What is the difference between percent and percentage points?
A change from 20% to 25% is a 5 percentage point increase, but a 25% relative increase. The calculator’s “percent change” mode gives the relative figure.