You have 24

homework problems for math class. You finish 12
of them during some extra time in class. If you complete 4
more problems while waiting for the bus, what fraction of the 24
problems will remain?

You have completed a total of 12 + 4 = 16 problems.

This means there are 24 - 16 = 8 problems remaining.
Therefore, the fraction of the problems remaining is 8/24 = 1/3.