Final answer:
Mac used 18 freezer bags to store the hamburger in his freezer.
Step-by-step explanation:
To find the number of freezer bags used by Mac, we need to divide the total weight of the hamburger by the weight of each freezer bag.
Given that Mac bought forty-eight pounds of hamburger and each freezer bag holds two and two-thirds pounds, we can divide the total weight by the weight of each bag:
48 ÷ 2 2/3 = 48 ÷ (8/3) = 48 x 3/8 = 144/8 = 18.
Therefore, Mac used 18 freezer bags to store the hamburger in his freezer.