Percentage Calculator
Percent of, change, ratio
20% of 500
100
- 500 + 20%
- 600
- 500 − 20%
- 400
How it worksX% of Y = X × Y ÷ 100. Change % = (new − old) ÷ old × 100.
FAQs
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. 20% of 500 = 500 × 20 ÷ 100 = 100.
How do I calculate percentage change?
Change % = (new value − old value) ÷ old value × 100.
How do I find what percent one number is of another?
Divide the first number by the second and multiply by 100. 50 is 25% of 200.