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.