Percentage Calculator
Three modes: find X% of Y, what percent X is of Y, and the percentage change between two numbers.
15% of 200 = 30
30 is 15% of 200
+25.0% change
Percentage Calculator
The percentage calculator handles the three most common percentage questions people ask every day: What is X% of Y?, What percent is X of Y?, and What is the percentage change from A to B?
Whether you are calculating a discount, a test score, sales tax, or a year-over-year growth figure, this tool gives you the answer instantly with no clicking around.
It is one of the most-used math tools on the web because percentages appear everywhere — finance, shopping, school, and business.
Frequently Asked Questions
How do I calculate X% of Y?
Multiply Y by X and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30.
How do I calculate percentage change?
Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase, a negative result is a decrease.
What is 20% off a price?
Multiply the price by 0.20 to get the discount, then subtract it from the original price. Example: $50 × 0.20 = $10 off, so you pay $40.
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