5%. I had a teacher in highschool, I was taking private lessons from him. I wasn't able to answer a physics quiestion back in the day.
Day 1: He comes, tells my father if I fuck up, he'll kick my ass. Do you agree? My father says you're the boss.
30 minutes into first lesson, I dayream, he slaps me so hard that I fell of my fucking chair.
Every time I fuck up, he slaps me so hard and tells me "you are a smart kid, you are better than that, NOW SOLVE THIS PROBLEM!".
Long story short, I became a computer engineer. We used to have one exam to be accepted into university. I solved 14 out of 15 physics question. I got enough points from that and got accepted.
We used to go out drinking with this guy. He was my mentor, like a father to me and I, like a son to him. We somehow lost connection in time.