Why is not accepting my answer, please?

Question

A string format problem is not accepting my answer even though is the same that is requesting, copy of my code attached, please review and any feedback as always is more than welcome!
https://code.sololearn.com/cdJoSsWR94CV/?ref=app

Answer 1

Thanks, ~ swim ~, do you mean the period after "exam"?
By the way, what is a diffent way to format a number and the % sign, for example those like 92%, 82%, etc., please

Answer 2

It's all together, ☹️, I'm not leaving any space there or do you see something?

Answer 3

~ swim ~ I'm sorry, but now is working, it seems that they don't want that last "." that we were talking about, so just to test, I removed the last dot and now is accepting my answer, 😬. Thanks!!!

Answer 4

~ swim ~ That is correct! Is their house and their rules and they do it in the way that they established.
Chukria (sorry if it is not the correct spelling 🙂).