3/4 of a cup from what you wrote. As you don't say that she needs milk for mac and cheese.
Answer:
Ok hi im good at math just let me do this in ten mins ok
Step-by-step explanation:
3/2 three over two divide 15/4by 5/2
C because if you divide 3/12 you get .25 but 4/18 is .22, which is the better deal