Percentage calculator
Get a percentage in a second: what is 15% of 200, how much a price went up, or what share one number is of another.
Result
30Result
- Number + this percentage
- 230
- Number − this percentage
- 170
Inputs
- What do you want to know?
- X% of Y
- Percentage
- 15
- Of the number
- 200
How it is calculated
X% of Y = X ÷ 100 × Y.
Result
Result
- Number + this percentage
- 230
- Number − this percentage
- 170
How it is calculated
- X% of Y = X ÷ 100 × Y.
- Change in % = (new − start) ÷ |start| × 100. A negative result is a decrease.
- Share in % = part ÷ total × 100.
Example
15% of 200 = 30. A price going from 100 to 120 rises by 20%.
Good to know
- A 10% rise followed by a 10% fall does not bring you back: 100 → 110 → 99.
- A change from 0 has no meaning: the tool says so instead of inventing a result.
Frequently asked questions
What is this tool used for?
Get a percentage in a second: what is 15% of 200, how much a price went up, or what share one number is of another.
How is the result calculated?
X% of Y = X ÷ 100 × Y.
What should I check before using the result?
A 10% rise followed by a 10% fall does not bring you back: 100 → 110 → 99.