Percentage Calculator
Calculate X% of Y, find what percentage a number is of another, or compute percent change — instantly, no signup.
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Knowledge Base
Frequently Asked Questions
How do I calculate X% of Y?↓
Multiply Y by X and divide by 100. For example, 20% of 150 = (20/100) × 150 = 30. Use the '% of' mode in this calculator to get the result instantly.
How do I find what percentage X is of Y?↓
Divide X by Y and multiply by 100. For example, 30 is what percentage of 150? (30/150) × 100 = 20%. Use the 'X is what % of Y' mode.
How is percent change calculated?↓
Percent change = ((New Value − Original Value) / |Original Value|) × 100. A positive result means an increase; negative means a decrease.
What is the difference between percentage and percentage points?↓
A percentage point is an absolute difference between two percentages. If interest rates rise from 3% to 5%, that is a 2 percentage point increase, but a 66.7% relative increase.