Percentage Calculator
Calculate percentage of a number, percentage change, and percentage ratios.
About this tool
Easily calculate discounts, test scores, financial returns, and growth rates.
How to use this tool
- Select calculation mode
- Enter values A and B
- Read result and explanation
How it works
Solves standard proportion equations with step-by-step explanatory text.
When to use this tool
- Test score calculations
- Sales growth metrics
Frequently asked questions
Can it calculate negative percentage change?
Yes, decreases are clearly marked with negative signs and labels.
Limitations
Numeric values only.
Privacy
All math is executed client-side.