Percentage Calculator
Percentage Calculator is a free online tool to calculate percentages.
Frequently Asked Questions About Percentages
How do I calculate a percentage of a number?
To calculate a percentage of a number, multiply the number by the percentage (converted to a decimal by dividing by 100).
Example: To find 15% of 80
Step 1: Convert percentage to decimal: 15% = 15/100 = 0.15
Step 2: Multiply: 80 × 0.15 = 12
Result: 15% of 80 is 12
How do I calculate what percentage one number is of another?
To find what percentage one number is of another, divide the first number by the second, then multiply by 100.
Example: What percentage is 24 of 80?
Step 1: Divide: 24 ÷ 80 = 0.3
Step 2: Multiply by 100: 0.3 × 100 = 30%
Result: 24 is 30% of 80
How do I calculate percentage increase or decrease?
To calculate percentage increase or decrease:
- Subtract the old value from the new value
- Divide the result by the old value
- Multiply by 100
Example: If a price increases from $80 to $100
Step 1: Find the difference: $100 - $80 = $20
Step 2: Divide by original value: $20 ÷ $80 = 0.25
Step 3: Multiply by 100: 0.25 × 100 = 25%
Result: The price increased by 25%
Calculate Percentages with Ease
Percentages are a way to express a number as a fraction of 100. They are used in many different areas of mathematics and everyday life. With our calculator, you can easily perform all common percentage calculations without any complex math.
Common Percentage Calculations
- Finding a percentage of a number (e.g., 15% of 80)
- Finding what percentage one number is of another (e.g., 24 is what % of 80)
- Calculate percentage increase or decrease between values
- Finding price after discount or tax
- Calculating tip amounts at restaurants
Applications of Percentages
- Financial calculations (interest rates, taxes, discounts)
- Business metrics (growth rates, profit margins)
- Statistics and data analysis (percentage distributions)
- Academic grading (test scores as percentages)
- Everyday shopping (sales, discounts, tips)