Answer:
64 mL
Step-by-step explanation:
Step 1: Find % of milk in each cup
1600(0.6) = 960 mL in cup A
1600 - 960 = 640 mL in cup B
Step 2: Find % milk drank in each cup
960(0.4) = 384 mL drank from cup A
640(0.7) = 448 mL drank from cup B
Step 3: Find the difference
448 - 384 = 64 mL
