Answer:
They expect to have 504 students next year.
Explanation:
In order to find the answer, you have to calculate the 4% of the number of students the school has and subtract that amount from the number of students to get the amount of students they expect to have next year as they expect that to decrease:
525*4%=21
525-21=504
According to this, the answer is that they expect to have 504 students next year.