For the 0.1% case where he actually would have needed math, he got away with it and just asked a friend. Nothing wrong in focusing on the 90% of the 90/10 and a

For the 0.1% case where he actually would have needed math, he got away with it and just asked a friend. Nothing wrong in focusing on the 90% of the 90/10 and asking for help if you're in that 10% part.