Question

if a book shef is 28 1/8 inches long, how many 1 7/8 inch thick books will it hold

Answer 1

28 1/8 / 1 7/8
28 1/8 = 225/8
1 7/8 = 15/8
that implies,
225/8 / 15/8
225/8 * 8/15
=15
hence it can hold 15 books