Question

If a recipe for a cake calls for 2 1/2 cups of flour and mary wishes to make 3 cakes, how many cups of flour does she need?

a. 6
b. 6 1/2
c. 7 1/2
d. 9
e. 9 1/2

Answer 1

To make 3 cakes,we multiply the flour needed by three,and here's the equation:

`2 (1)/(2) * 3 \\ = (5)/(2) * 3 \\ = (15)/(2) \\ = 7 (1)/(2)`
Thus, she'll need 7 and 1/2 cups of flour.

hope it helps!