A recipe calls for 2/3 of a cup of milk for 10 cookies. How many cups of milk are needed to make 90 cookies? How many for 60?

Answer 1

90 = 9 times 10. you need 9 times as many cups. 2/3 x 9 = 18/3 = 6 cups of milk to make 90

60 is 6 times 10, you need 6 times as many cups. 2/3 x 6 = 4 cups to make 60 cookies