A recipe calls for 2 cups of flour to make 24 cookies. How many cups of flour would it take to make 39 cookies?

2 answers

2 * (39 / 24)
1 cup ==> 12 cookies, so one cookie is made using 1/12 of a cup. So using this...
39 cookies are made using 39/12 cups of flour, which would be your answer.