10 1/2 - 8 5/8 = 2 and 1/8?

Answer 1

Nope. 4/8 - 5/8 doesn't equal 1/8

10 1/2 = 10 4/8 = 9 12/8

9 12/8 - 8 5/8 = ?

Answer 2

10 1/2 - 8 5/8
= 21/2 - 69/8
Take L.C.M = 8
84 - 69 /8 = 15/8 = 1 7/8 or 1.8