Cam has a piece of plywood that is 6 7/8 feet wide. He is going to cut shelves from the plywood that are each 1 1/6 feet wide. Which is a good estimate for the number of shelves Cam can make?

Cam would be able to make about 4 shelves

6 7/8 = 55/8

6 1/6 = 7/6

first find common denominators

55/8 * 3 = 165/24

7/6 * 4 = 28/24

165/24 divided by 28/24 is the same as 165/24 time 24/28

so that equals 3960/672

which equals 5.8928

so estimates about 5 shelves