Answer:
3.6 cups of milk
Step-by-step explanation:
Create a proportion where x is the number of cups of milk needed for 9 servings:
=
Cross multiply and solve for x:
5x = 18
x = 3.6
So, 3.6 cups of milk are needed to make 9 servings.
See below
LCM OF 9, 15 = 45
LCM OF 2, 3, 5 = 30
LCM OF 12, 28 = 84