This is my second post on this subject, you can find the first on III here:
If you didn't see the first thread, basically what I've done is figured out exactly what in the games constitutes 100%. How many objectives, what counts as an objective, what are the individual percentages, etc. Mostly just something I did for fun and out of curiosity and decided since I did the work I may as well share it.
At a basic level Vice City is structured exactly the same as III. There