Percentage Calculator
Calculate percentages, percentage change, percentage difference, and what percentage one number is of another.
Enter any two values and leave the value you want to calculate empty.
Percentage calculator formulas
What is X% of Y?
Divide the percentage by 100 and multiply it by the number.
X is what percent of Y?
Divide X by Y and multiply the result by 100.
Percentage increase or decrease
Subtract the original value from the new value, divide by the original value, then multiply by 100.
Percentage difference
Percentage difference compares two values using their average as the reference point.
Percentage examples
What is 20% of 500?
20 ÷ 100 × 500 = 100
Answer: 100
50 is what percent of 200?
50 ÷ 200 × 100 = 25%
Answer: 25%
100 increased to 125
(125 − 100) ÷ 100 × 100 = 25%
Answer: 25% increase
Difference between 100 and 120
20 ÷ 110 × 100 ≈ 18.18%
Answer: about 18.18%
FAQ
Frequently asked questions
How do I calculate 10% quickly?
Divide the number by 10. For example, 10% of 450 is 45.
What is the difference between percentage change and percentage difference?
Percentage change is used when there is an original value and a new value. Percentage difference is used when comparing two values without treating either one as the starting value.
Can a percentage be greater than 100%?
Yes. For example, 150% of 100 equals 150.
Why can't percentage change use zero as the original value?
The percentage change formula divides by the original value, so percentage change is undefined when the original value is zero.