Question

There are 2 3/4 cups of flour in a recipe for one dozen oatmeal cookies. How many cups of flour are needed for 6 1/2 dozen cookies?

Answer 1

17 ⅞ cups

Explanation:

2 3/4 = 11/4

6 1/2 = 13/2

Flour : cookies (dozen)

11/4 : 1

X : 13/2

X/(13/2) = (11/4)/1

X = 13/2 × 11/4

X = 123/8

17 7/8 cups