Percentage Calculator
Calculate percentages, find what percent one number is of another, and measure percentage change.
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About this calculator
This calculator solves the percentage problems people run into most often: taking a percent of a value, asking what percent one number is of another, and measuring how much a value has changed.
How to calculate
Choose a calculation type, enter the two values, and press Calculate. Use “What is X% of Y?” for tips, tax, and discounts. Use “X is what % of Y?” to compare a part against a whole. Use percentage change to compare an old value with a new one.
Part = (Percent / 100) × Whole
Percent = (Part / Whole) × 100
Change = ((New − Old) / Old) × 100
Examples
20% of 150
20 ÷ 100 × 150 = 30. So 20% of 150 is 30.
Price increase
If a price rises from 80 to 100, the change is ((100 − 80) / 80) × 100 = 25%.
FAQ
What is 20% of 150?
20% of 150 is 30. Divide 20 by 100, then multiply by 150.
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original value, then multiply by 100. A rise from 80 to 100 is a 25% increase.
Is 20% of 50 the same as 50% of 20?
Yes. Percentages are commutative in this form, and both calculations equal 10.