Percentage Calculator
Calculate percentages, find what percentage one number is of another, or determine percentage changes between values.
How to Use This Calculator
The Percentage Calculator offers three types of calculations:
- What is X% of Y?
- Enter the percentage in the first field
- Enter the number in the second field
- Example: What is 15% of 200? Answer: 30
- X is what percentage of Y?
- Enter the number (X) in the first field
- Enter the total (Y) in the second field
- Example: 30 is what percentage of 200? Answer: 15%
- Percentage change from X to Y
- Enter the original value in the first field
- Enter the new value in the second field
- Example: Change from 100 to 150 = 50% increase
Understanding Percentage Calculations
Percentages are a fundamental mathematical concept used to express parts of a whole, where the whole is represented as 100. The word percentage comes from the Latin "per centum" meaning "by the hundred."
There are several common types of percentage calculations:
- Basic Percentage: To find a percentage of a number, multiply the number by the percentage and divide by 100.
- Reverse Percentage: To find what percentage one number is of another, divide the first number by the second and multiply by 100.
- Percentage Change: To find the percentage change, subtract the old value from the new value, divide by the old value, and multiply by 100.
Percentages are widely used in various fields including:
- Finance (interest rates, discounts)
- Statistics (population growth, market share)
- Science (concentration solutions, efficiency)
- Education (test scores, grade calculations)
What is X% of Y?
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