While funny, it’s usually courteous (at least in the United States) to tip a server more than 11.7% if given good service at restaurant.
How Mathematicians Tip
John Quintanilla Geometry, Humor 1 Minute
Published by John Quintanilla
I'm a Professor of Mathematics and a University Distinguished Teaching Professor at the University of North Texas. For eight years, I was co-director of Teach North Texas, UNT's program for preparing secondary teachers of mathematics and science. View all posts by John Quintanilla