Percentage Calculator

Pick the mode you need.

Result
50

How it works

Three modes: 'X% of Y', 'percent change', and 'X is what % of Y'.

Formula

% of: X/100 · Y · Change: (Y − X)/|X| · 100 · X of Y: X/Y · 100

Worked example

20% of 250 = 50. Change 80→100 = +25%.

FAQ

How to compute a discount?
Use 'X% of Y': discount × price.
Increase vs decrease?
Positive change = increase; negative = decrease.
Decimal inputs?
Yes.

Related calculators