ToolBox FreeMATH TOOL
Percentage Calculator
Calculate percentages and percentage changes with clear, instant results.
What is X% of Y?
Percentage (X)
Number (Y)
30
15% of 200 is 30.
Percentage change
Original value
New value
25%
Increase of 25%.
Percentage formula
To find X percent of Y, multiply Y by X and divide by 100. Percentage change is (new value − original value) ÷ original value × 100. When the original value is zero, percentage change is undefined.
Examples
15% of 200 is 30. If a value increases from 80 to 100, the percentage increase is 25%.