A recipe calls for 2 cups of flour to make 24 cookies. Write and solve a proportion to find how much flour is needed to make 54 cookies.
A. 2/24 = x/54; x = 4 1/2 cups
B. 2/54 = x/24; x = 8/9 cup
C. 2/54 = 24/x; x = 27 cups
D. 2/24 = 54/x; x = 648 cups
