Question

Rina’s recipe uses 2 cups of sugar to make 2 ½ dozen cookies. Jonah’s recipe uses 2 ¼ cups of sugar to make 3 dozen cookies. Which recipe uses more sugar for a dozen cookies? Why?

Answer 1

Let's calculate the "cups of sugar per dozen cookies" ratio:

2 cups

---------- = 0.8 (Rina)

2.5

2.25 cups

------------- = 0.75 (Jonah)

3

Rina uses more sugar for a dozen cookies.