Percent calculator
Percent of a value, one value as a percent of another, percentage change, and adding or removing a percentage.
What is X % of a value?
%
- Result
- 30
What percent is one value of another?
- Part as a share of the whole
- 15%
Percentage change
- Change
- 25%
- Difference
- 20
Add or remove a percentage (tax, discount)
%
- Value after the change
- 108.1
- Original if the value already includes it
- 92.5069
How it works
Percent means 'per hundred'. A rise of 25 % is undone by a fall of 20 %, because the two refer to different base values.
Formulas
- X % of V = V · X / 100
- change = (new − old) / old · 100 %
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