Percentage Calculator
Solve any percentage-related calculation instantly.
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About Percentage Calculator
Solve complex percentage math without a headache. This comprehensive calculator handles three major modes: basic percentages, finding proportions, and calculating percentage increases or decreases (growth/decline).
How to Use
- Choose your mode: Basic, Proportion, or Growth.
- Enter the numeric values into the corresponding fields.
- The result will be calculated automatically as you type.
- Use the 'Growth' mode to find the percentage change between two numbers.
Common Use Cases
- Calculating discounts and sales tax during shopping.
- Analyzing business growth, profit margins, or stock market changes.
- Working out grades or statistics for school projects.
Technical Details
Implements decimal-precision math to avoid common floating-point errors found in basic calculators.
Frequently Asked Questions
- How do I calculate a 20% tip?
- Use 'Basic Percentage' mode: enter 20 as the percentage and your bill total as the 'of' value.
- What is percentage change?
- It is the difference between two values expressed as a percentage of the original value, showing how much something increased or decreased.
100% Private & Secure
This tool runs entirely in your browser using client-side technology. Your files and data are never sent to a server, ensuring 100% privacy and speed.