Percentage Calculator
Calculate percentages three different ways: find a percentage of a number, find what percent one number is of another, or find the percentage increase or decrease between two numbers.
What is X% of Y?
X is what percent of Y?
Percentage Change from X to Y
How to Use the Percentage Calculator
- Choose the calculator that matches your question — there are three above.
- Enter your numbers into the fields.
- Click "Calculate" to see the result instantly.
Frequently Asked Questions
How do I calculate a percentage increase?
Use the "Percentage Change" calculator: enter the starting value as X and the new, higher value as Y. A positive result is an increase.
How do I calculate a percentage decrease?
Use the same "Percentage Change" calculator. If the ending value (Y) is lower than the starting value (X), the result will show a decrease.
What is the formula used for 'X% of Y'?
The formula is (X ÷ 100) × Y. For example, 20% of 150 is (20 ÷ 100) × 150 = 30.
What is the formula for 'X is what percent of Y'?
The formula is (X ÷ Y) × 100. For example, 30 is what percent of 120 is (30 ÷ 120) × 100 = 25%.
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