About the Percentage Calculator
Answer the everyday percentage questions: X% of Y, what percent one number is of another, percentage increase or decrease, and adding or subtracting a percentage.
How to use
- Type in any card and the answer updates instantly.
- Click an answer to copy it.
Formula
Change % = (New − Old) ÷ |Old| × 100
Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 500 = 500 × 20 ÷ 100 = 100.
How do I calculate percentage change?
Subtract the old value from the new value, divide by the old value and multiply by 100. From 800 to 1,000 is a 25% increase.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. For example, 45 is 25% of 180.