Answer:
13 buses
Explanation:
We have 314 students, and each bus seats 25 students. Let's divide 314 with 25.
314/25 = 12.56
This means in order to seat everyone, you would need 12.56 buses. But you can only have whole buses, meaning round up 12.56 to 13. So, 13 buses are necessary.
Feel free to comment if this doesn't make sense, and I'll try to explain it in a different way.