Percentage Calculator
Calculate percentages instantly - find what percent a number is of another, calculate increases/decreases, and more.
What is X% of Y?
%
of
Result
0
Formula: (X ÷ 100) × Y = Result
Quick Reference
Common Percentages
- 10% of 100 = 10
- 20% of 100 = 20
- 25% of 100 = 25
- 50% of 100 = 50
- 75% of 100 = 75
Percentage Tips
- To find 10%, move decimal left
- To double, that's 100% increase
- Half is 50% decrease
- 5% = 10% ÷ 2
- 1% = value ÷ 100
Real World Examples
- 15% tip on $50 = $7.50
- 20% off $80 = $64
- Sales tax 8% = $8 per $100
- 10% raise from $45k = $49.5k
- 30% discount saves $30 per $100