What is X% of Y?
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Percentage Increase/Decrease
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About Our Free Percentage Calculator
Our free percentage calculator makes it easy to solve all types of percentage problems. Whether you need to find what percentage one number is of another, calculate a specific percentage of a value, or determine percentage increases and decreases, our tool handles it all with accuracy and ease.
Types of Percentage Calculations
- What is X% of Y? - Find a percentage of a number (e.g., What is 15% of 200?)
- X is what percent of Y? - Calculate what percentage one number is of another (e.g., 30 is what percent of 120?)
- X is Y% of what? - Find the total when you know a part and its percentage (e.g., 45 is 30% of what?)
- Percentage Increase/Decrease - Calculate the percentage change between two values (e.g., from 80 to 100)
Common Percentage Formulas
These are the formulas our calculator uses:
- What is X% of Y? = (X/100) × Y
- X is what percent of Y? = (X/Y) × 100
- X is Y% of what? = X ÷ (Y/100)
- Percentage Increase/Decrease = ((New Value - Original Value) / |Original Value|) × 100
Applications of Percentage Calculations
Percentages are used in many everyday situations:
- Calculating tips at restaurants
- Computing discounts during sales
- Determining tax amounts
- Measuring business growth or decline
- Comparing performance metrics
- Calculating interest on loans or investments
- Analyzing data in statistics
Our percentage calculator is free to use, with no registration required. It works on all devices - desktops, tablets, and smartphones. Use it for school, work, or everyday calculations to quickly find accurate percentage results!