Percent Button Doesn't Work

[mindfultatiana]

Describe the bug
I am able to do basic calculations with the calculator but when I try to add or subtract the percentage it doesn't work.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'TkinterCalculator'
2. Click on 'myCalculatorV2.py'
3. Scroll down to '# Calculate percentage' line 67-76
4. Run the calculator and try to add or subtract a percentage
5. See error

Expected behavior
I want the calculator to be able to add, subtract, multiply, and divide a percentage.

Desktop (please complete the following information):

• OS: Windows 11
• VS Code

Additional context
This may be an issue between the GUI and eval(). The main problem is it's parsing a string into numbers through the display. It's hard to grab a number and divide or multiply it before it's been parsed because it's still a string.