Percentage Calculator
Calculate percentages, find percentage changes, and solve common percentage problems with our comprehensive calculator.
Basic Percentage Formulas
Percentage: (Value ÷ Total) × 100
Value from Percentage: (Percentage × Total) ÷ 100
Total from Percentage: (Value × 100) ÷ Percentage
Example: 25% of 80 = (25 × 80) ÷ 100 = 20
Percentage Change Formulas
Percentage Change:
((New Value - Original Value) ÷ Original Value) × 100
Percentage Increase: Change is positive
Percentage Decrease: Change is negative
Example: Change from 50 to 75 = ((75 - 50) ÷ 50) × 100 = 50% increase
Common Applications
• Discounts and sales tax
• Tips and gratuities
• Investment returns
• Grade calculations
• Market share analysis
• Population growth