1). How many shelves each 2 3/4 feet in length can be cut from a piece of lumber that is 15 2/3 feet long?

Answer 1

15 2/3 = 47/3
2 3/4 = 11/4

(47/3) / (11/4)

(47/3) * (4/11) = 188/33 = 5.7 = 5 shelves