Proportions are no problem anymore. For this, only 3 of 4 variables must be entered. All calculations are stored in the history. The final solution can be shared.

[ Content ]
- the variables must be entered
- calculation with the rule of proportion
- history function that saves input
- detailed solution
- the entering of fractions and decimals is supported
- constants can be entered
- option to remove ads

[ Usage ]
- there are 4 fields for entering the values ​​using a modified keyboard
- if you have entered wrong values or values are missing, the text fields are highlighted
- you can switch between the solution, input view and history by swiping and / or touching the buttons
- the entries in the history can be deleted or sorted manually
- if you select an entry in the history, it will be loaded automatically for the calculation
- the entire history can be deleted by pressing a key