What is Prozentrechner?

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

1. Select the calculation mode (ratio, value, or change rate).
2. Enter the required values A and B.
3. Click 'Calculate'.
4. 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.