Not sure what is meant in the 1st panel by 100%? Well it’s simple! For example, if your total bill at a restaurant (before tax) amounts to $50 then you’d tip $50. However, this is extremely rare. The set gratuity is 17%, your server is always hoping for an even 20% (which is a $10 tip on a $50 dollar ticket).
Seem to much to ask for? Well in most states, a server is paid $2.35 per hour. Just enough to cover taxes meaning that their actual income is made up of whatever tips they get. Just some food for thought.