Final answer:
Azaria has 0.5 boxes of cereal remaining.
Step-by-step explanation:
To find out how many boxes of cereal remain, we need to subtract the number of boxes Azaria went through from the initial number of boxes she had.
She had 4 boxes and she went through 7/2 (3.5) boxes. So, the number of boxes of cereal remaining is 4 - 3.5 = 0.5 boxes.