Percentage Calculator Pro
Professional tool to calculate percentages, increases, discounts and percentage differences. Perfect for finance, business and everyday math.
Basic Calculations
Perform fundamental percentage calculations quickly and accurately.
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Advanced Calculations
More complex percentage operations for professional needs.
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How to calculate percentages?
Percentage of a number
To calculate X% of a number Y, multiply Y by X and divide by 100. Example: 20% of 150 = (20 × 150) ÷ 100 = 30
Percentage increase
To increase a number by X%, multiply the number by (1 + X/100). Example: 100 increased by 15% = 100 × 1.15 = 115
Percentage decrease
To decrease a number by X%, multiply the number by (1 - X/100). Example: 100 decreased by 15% = 100 × 0.85 = 85
Percentage difference
To calculate the % difference between A and B: (|A - B| ÷ ((A + B)/2)) × 100. Example: from 100 to 120 = 20/110 × 100 ≈ 18.18%
