Percentage Calculator
The four everyday percentage operations in one place: X% of Y, "X is what % of Y", percent change, and add/subtract a percent.
About the Percentage Calculator
Percent means "per hundred": X% of Y = X/100 × Y. Percent change = (new − old)/old × 100. A 50% rise followed by a 50% fall does not return to the start: percentages compound on different bases.