Sterling makes trail mix by mixing 2 parts peanuts with 3 parts chocolate candy. Sterling has an unlimited supply of peanuts in the pantry, but only 18 cups of chocolate candy. How many cups of trail mix can he make?
Since he has 3 part chocolate all he has 18 cups left. You can keep adding 3 till you get 18 and how many ever groups you have with 3 (which is 5 groups) is the answer.
