Hi
I'd suggest that renaming the progress related words (as shown in the screenshot below) to 0, 25, 50, 75, and 100 would make it much easier to remember and update by just pressing the first number.
For example, if I want to change the progress bar to three quarter, I just ned to type in 7 (which will pull 75%). This is especially more practical because we usually talk about progress in numbers (e.g. 75%), and not three quarter).
This will also help the keyboard freaks!