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Percentage Calculator
What is
% of ?
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How to Use the Percentage Calculator
- % of Number: Enter a percentage and a number to find what that percentage equals
- What %?: Enter two numbers to find what percentage the first is of the second
- % Change: Enter the original and new values to calculate the percentage increase or decrease
- Click "Calculate" to see your result instantly
Common Percentage Calculations
- Shopping - Calculate discounts, sales tax, or tips
- Finance - Determine interest rates, investment returns, or budget allocations
- School - Convert test scores to percentages or calculate grade averages
- Health - Track weight loss/gain percentage or nutritional values
- Business - Analyze growth rates, profit margins, or market share
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Frequently Asked Questions
How do I calculate percentage of a number?
To find X% of Y, multiply Y by X and divide by 100. For example, 20% of 150 = 150 × 20 / 100 = 30.
How do I find what percentage one number is of another?
To find what percent X is of Y, divide X by Y and multiply by 100. For example, 30 is what % of 150? = (30/150) × 100 = 20%.
How do I calculate percentage increase or decrease?
Percentage change = ((New - Old) / Old) × 100. A positive result is an increase, negative is a decrease.
Is this calculator accurate?
Yes, our calculator uses standard mathematical formulas and provides precise results up to 2 decimal places.