Yeah, actually see the comment from @sambillingham above -- he mentions that he doesn't know if that's the definitive name, but it's one people use to refer to that value.

I think maybe the 75% number that you've seen is referencing how about 75% of the payout from a post goes to the author, whereas 25% goes to the curators (people who voted on the post).

I'm glad I could help! It's definitely confusing at first. 😀