Percentage Calculator
What is X% of Y?
Formula: (X ÷ 100) × Y
X is what % of Y?
Formula: (X ÷ Y) × 100
Percentage Increase/Decrease
Formula: ((New - Original) ÷ Original) × 100
Common Percentage Examples
20% of 50: 10 (20 ÷ 100 × 50 = 10)
15 is what % of 50: 30% (15 ÷ 50 × 100 = 30)
Price increase from $80 to $100: 25% increase ((100-80) ÷ 80 × 100 = 25)
Discount of $30 on $150 item: 20% off (30 ÷ 150 × 100 = 20)