Percentage Calculator
Quickly calculate percentages, percentage change, and what percent one number is of another.
Three Calculation Modes
- X% of Y — Find what X percent of a number is. Example: 20% of 150 = 30.
- X is what % of Y? — Find the percentage one number represents of another. Example: 30 is 20% of 150.
- % Change — Calculate the percentage increase or decrease from one value to another. Example: from 80 to 100 is a +25% change.
Formulas
- X% of Y = Y × (X ÷ 100)
- What % = (X ÷ Y) × 100
- % Change = ((New − Old) ÷ |Old|) × 100