Final answer:
To find the number of fewer students in Julia's math class compared to her writing class, we need to know the specific number of students in each class.
Step-by-step explanation:
To find the number of fewer students in Julia's math class compared to her writing class, we need to know the number of students in each class. Let's say there are x students in her math class and y students in her writing class. The number of fewer students in the math class would be y - x.
Answer: The correct option would depend on the specific number of students in each class, which is not provided in the question. Therefore, we cannot determine the exact number.