Percentage Calculator
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How to Use the Percentage Calculator
Choose the type of calculation you need from the dropdown menu:
- What is X% of Y? — Find a percentage of a number (e.g., 20% of 200 = 40)
- X is what % of Y? — Find what percent one number is of another
- Percentage increase/decrease — Calculate the percentage change between two values
Percentage Formulas
Find X% of Y:
Result = (X ÷ 100) × Y
X is what % of Y:
Percentage = (X ÷ Y) × 100
Percentage change:
Change = ((New - Original) ÷ Original) × 100
Frequently Asked Questions
Use the "What is X% of Y?" mode. Enter the discount percentage as X and the original price as Y. The result is the amount you save.
Use the "What is X% of Y?" mode. Enter 15 or 20 as X and your bill total as Y. The result is the tip amount. For splitting, use our Tip Calculator.
Percentage change measures how much a value has increased or decreased relative to its original value. It's commonly used in finance, business, and data analysis.