I have this dancer with an amazing base str of 30 and a strength growth chance of 102%!

I do wonder, does this just mean he will definitely grow +2 str per level, or does it mean he will grow +2 str AND has a 2% chance to get an additional +2 str for a total of +4 on a level-up?

It seems followers are supposed to only gain +1 strength on a level-up, but there’s a random chance for yet another +1 strength when it happens. That is cool. In this case my question is does my follower have a 2% chance to gain +3 to strength on a level-up?