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I would change that to this:
9.25% is 0.0925

What grade level do they teach percentages?

Basic math should be a prerequisite for a programming course.

Can you compute 9.25% of 33.33?
If you can do it, what are the steps you took to do it?
If you don't know what percent means, try googling to find out.
Hasn't your math training explained what...

You left off this part:
explain why it is wrong and show what you want it to be.

The + operator does different things that can be confusing. Some times it sums two numbers to give a numeric...

Please show what the program outputs and explain why it is wrong and what you want it to be.