What is X% of Y?
Result
X is what % of Y?
Result
Percentage Change
Result
Find Original Value NEW
Original Value

Quick Examples

Tip Calculation
15% tip on $50 bill = $7.50
Discount
30% off $80 = $56 final price
Tax Calculation
$100 + 8% tax = $108
Reverse Calculation
$115 with 15% increase = $100 original