Free Percentage Calculator - Calculate Any Percentage Online
Calculate percentages, percentage increases, decreases, and find what percentage one number is of another. Get instant accurate results with step-by-step explanations.
What percentage is X of Y?
Find what percentage one number is of another
Percentage Increase Calculator
Calculate the result after a percentage increase
How to Use the Percentage Calculator
Calculate What Percentage One Number Is of Another
Enter the number you want to find the percentage of in the first field, and the total or whole number in the second field.
Formula: (Number ÷ Total) × 100 = Percentage
Calculate Percentage Increase
Enter the original value and the percentage increase to find the new value after the increase.
Formula: Original Value + (Original Value × Percentage ÷ 100) = New Value
Common Percentage Calculations
- • Sales tax calculations
- • Discount calculations
- • Grade percentages
- • Interest calculations
- • Statistical analysis
Quick Percentage Answers
Voice search and featured snippet optimized answers
How to calculate percentage of a number?
To calculate a percentage of a number: (Percentage ÷ 100) × Number = Result
Example: 25% of 80 = (25 ÷ 100) × 80 = 20
What percentage is one number of another?
(Part ÷ Total) × 100 = Percentage
Example: What % is 15 of 60? (15 ÷ 60) × 100 = 25%
How to calculate percentage increase?
((New Value - Original Value) ÷ Original Value) × 100 = Percentage Increase
Example: 50 to 75 = ((75-50) ÷ 50) × 100 = 50% increase
How to calculate percentage decrease?
((Original Value - New Value) ÷ Original Value) × 100 = Percentage Decrease
Example: 100 to 80 = ((100-80) ÷ 100) × 100 = 20% decrease
Frequently Asked Questions
How do you calculate 20% of a number?
To calculate 20% of a number, multiply the number by 0.20 or divide it by 5. For example, 20% of 100 is 100 × 0.20 = 20.
What is the formula for percentage increase?
Percentage Increase = ((New Value - Original Value) ÷ Original Value) × 100
How to calculate percentage difference?
Percentage Difference = ((|Value 1 - Value 2|) ÷ ((Value 1 + Value 2) ÷ 2)) × 100
Can I calculate percentage decrease?
Yes! Use a negative percentage in the increase calculator, or calculate: Original Value - (Original Value × Decrease Percentage ÷ 100).
What are common percentage calculations?
Common uses include calculating tips (15-20%), sales tax (varies by state), discounts (10-50% off), grade percentages, and investment returns.
How accurate is this percentage calculator?
Our calculator uses JavaScript's built-in math functions and provides results accurate to 2 decimal places for most practical applications.