If you don't know which mission you are missing, the official Rockstar Games website can look up the progress you need:
https://socialclub.rockstargames.com/games/gtav/xboxsx/caree...In-game missions are much more than 100% progress, but it doesn't have to be all done,
some missions on the list will have color mark on the left side of the icons (Like: In the Hobbies and Pastimes list, mission with a green mark on the left side are required for 100% progress).