Percentage Calculator
A versatile tool to handle all your percentage calculations.
1. What is X% of Y?
2. X is what percent of Y?
3. Percentage Increase/Decrease
About this Tool
The Percentage Calculator is a versatile tool for handling all types of percentage-based problems. Whether you need to find a percentage of a number, determine what percentage one number is of another, or calculate percentage increase or decrease, this tool has you covered.
Common Use Cases
Shopping Discounts
Quickly calculate how much you'll save during a sale (e.g., 25% off a $80 item).
Calculating Tips
Easily figure out how much to tip at a restaurant (e.g., 18% of a $55 bill).
Financial Analysis
Calculate percentage changes in stock prices, revenue, or other financial metrics.
Academic Grades
Determine your score on a test as a percentage (e.g., 45 correct answers out of 50 questions).
Pro Tips
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Understanding 'Of'
In math, the word 'of' almost always means 'multiply'. So, '20% of 50' means '0.20 × 50'.
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Decimal Conversion
To convert a percentage to a decimal, divide by 100 (e.g., 25% becomes 0.25). To convert a decimal to a percentage, multiply by 100.
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Percentage Change Formula
The formula for percentage change is: ((Final Value - Initial Value) / |Initial Value|) × 100.
Examples
20% of 500
Finding a percentage of a number: 20% of 500 is 100.
- Convert 20% to a decimal: 20 / 100 = 0.20.
- Multiply: 0.20 × 500 = 100.
- Check with mode 2: (100 / 500) × 100 = 20%.
80 increased to 100
Percentage change from 80 to 100 is a 25% increase.
- Difference: 100 − 80 = 20.
- Divide by initial: 20 / 80 = 0.25.
- Multiply by 100: 0.25 × 100 = 25% increase.
FAQs
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