Percentage Calculator
Calculate percentages, percentage of a number, percentage increase/decrease, and more
How to calculate percentages is one of three questions: what percent one number is of another, what a percent of a number is, or the percent increase or decrease between two numbers.
Calculator Inputs
Choose the type of percentage calculation you need
Enter the first number
Enter the second number
Results
Enter values above to see your results
How It Works
Choose your calculation type, enter your numbers, and get instant results. The calculator handles all common percentage calculations with clear explanations.
Worked example
X is what percent of Y?
(25 / 200) × 100= 12.5%What is X% of Y?
(15 / 100) × 80= 12Percentage increase/decrease from X to Y
((50 - 40) / 40) × 100= 25% increase((40 - 50) / 50) × 100= -20%, a 20% decreaseTips & Best Practices
- •To find what % X is of Y: divide X by Y and multiply by 100
- •To find X% of Y: multiply Y by X and divide by 100
- •Percentage increase = ((New - Old) / Old) × 100
- •A 50% increase followed by a 50% decrease does not return to the original value
- •When comparing percentages, consider the base values for context
Frequently Asked Questions
How do I calculate a percentage increase?
Subtract the original value from the new value, divide by the original value, then multiply by 100. Formula: ((New - Original) / Original) × 100
What's the difference between percentage point and percent?
Percentage points are absolute differences. If something goes from 10% to 15%, that's a 5 percentage point increase but a 50% relative increase.
How do I calculate what percent one number is of another?
Divide the first number by the second number, then multiply by 100. For example: 25 is what % of 200? (25 ÷ 200) × 100 = 12.5%
Can I calculate percentage decrease?
Yes! Use the percentage change calculator. If the result is negative, it represents a percentage decrease.
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