Percentage Calculator
Solve common percentage problems
Percentage
of
Number
Result
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How to Use This Calculator
1
Select the type of percentage calculation you need (percentage of, percentage change, etc.)
2
Enter the numbers in the appropriate fields
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The calculator instantly shows your result
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Try different values to compare scenarios
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Use the formula explanations below to understand the math
Pro Tips
- •For discounts: Calculate the percentage off, then subtract from the original price
- •For tips: 15-20% is standard in restaurants; use 20% for easy mental math
- •For test scores: Divide points earned by total points, then multiply by 100
- •For growth rates: Use percentage change to track increases over time
- •Remember: 'percent' means 'per hundred' - 25% = 25/100 = 0.25
Percentage of a Number
Result = (Percentage × Number) ÷ 100Where:
Percentage= The percent you want to findNumber= The total or base numberExample:
Percentage= 25%Number= 200Calculation:
(25 × 200) ÷ 100 = 5,000 ÷ 100Result: 50
Percentage Change
Change % = ((New - Old) ÷ Old) × 100Where:
New= New or final valueOld= Original or starting valueExample:
Old= $50New= $75Calculation:
((75 - 50) ÷ 50) × 100 = (25 ÷ 50) × 100Result: 50% increase
Frequently Asked Questions
Divide the first number by the second number, then multiply by 100. For example, to find what percentage 25 is of 200: (25 ÷ 200) × 100 = 12.5%. This is useful for calculating test scores, completion rates, or comparing values.