A catering company needs 8.75 lbs of shrimp for a small party. They buy 3 2/3 lbs of jumbo shrimp, 2 5/8 lbs of medium-sized shrimp, and some mini-shrimp. How many pounds of mini shrimp do the buy?

8.75 - (3 2/3 + 2 5/8) 
8.75 - (11/3 + 21/8)
8.75 - (88/24 + 63/24)
8.75 - 151/24
210/24 - 151/24
59/24 = 2 11/24 lbs of mini shrimp <==