Calculate percentages, percentage change between values, and what percent one number is of another.
This calculator offers three modes: find X% of a number, calculate the percentage change between two values, or determine what percentage one number is of another.
For “What is X% of Y?” — enter the percentage and the number. For “Percentage Change” — enter the original and new values. For “X is what % of Y?” — enter the value and the total.
Click Calculate to get your result instantly.
Percentage of a number:
Result = (X / 100) × YPercentage change:
Change = ((New − Old) / |Old|) × 100%What percent X is of Y:
Percentage = (X / Y) × 100%Example 1: What is 15% of 250?
Example 2: Percentage change from 80 to 100:
Example 3: 45 is what percent of 200?
Multiply the number by the percentage divided by 100. For example, 20% of 150 is 150 × 0.20 = 30.
Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result means an increase; negative means a decrease.
If a rate goes from 5% to 8%, it increased by 3 percentage points but by 60% in relative terms ((8−5)/5 × 100). Percentage points measure absolute difference; percent measures relative difference.