Percentage Calculator
The three percentage calculations everyone needs — find a percentage of a number, find what percent one number is of another, and find the percentage increase or decrease between two values.
What is% of?30
is what percent of?15%
Percentage change fromto?+25%
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example 15% of 200 = 200 × 15 ÷ 100 = 30.
How do I work out what percent one number is of another?
Divide the part by the whole and multiply by 100. For example 30 out of 200 = 30 ÷ 200 × 100 = 15%.
How is percentage change calculated?
Subtract the old value from the new value, divide by the old value, and multiply by 100. Going from 100 to 125 is (125 − 100) ÷ 100 × 100 = +25%.
How do I calculate exam marks percentage?
Use the second row: your marks obtained 'is what percent of' the total marks. For example 432 out of 500 = 86.4%.