About This Tool
What is Percentage Calculator?
A tool for performing common percentage calculations. Supports three modes: 'What percent is A of B', 'What is A% of B', and 'Percentage change from A to B'. Useful for discount rates, growth rates, and ratio calculations.
How to Use
- Select the calculation mode (ratio, value, or change rate).
- Enter the required values A and B.
- Click 'Calculate'.
- The result is displayed instantly.
Key Features
- Three percentage calculation modes
- Clean, intuitive interface
- Precise calculations to decimal points
- Instant result output
Tips
- Use the 'change rate' mode for calculating discount percentages.
- ROI calculations work well with the 'change rate' mode.
- Use the 'ratio' mode to find profit margins relative to cost.
Percentage Calculator
Perform common percentage calculations
Calculate A percent of B
Frequently Asked Questions
How do I calculate a discount percentage?โผ
Use the 'percentage change' mode. Enter the original price as A and the sale price as B. For example, if an item was $100 and is now $75, the result is -25% (a 25% discount). The negative sign indicates a decrease.
How do I find what percentage one number is of another?โผ
Use the 'A is what % of B' mode. For example, if you scored 85 out of 100 on a test, enter A=85 and B=100 to get 85%. This mode is useful for grade calculations, completion rates, and market share analysis.
How do I calculate a tip or tax amount from a percentage?โผ
Use the 'what is A% of B' mode. For example, to calculate 18% tip on a $50 meal, enter A=18 and B=50 to get $9. For tax, enter the tax rate as A and the pre-tax amount as B.
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