We have a total of 24 students in Michelle's homeroom.
To solve this question, we need to obtain 30% of the total of these students, that is, those that rode the bus to school from Michelle's homeroom.
We just need to multiply the total of the students by 30, and then divide the result by 100.
Therefore
(24 * 30) / 100 =
720 / 100 =
7.2
That is, 30% of 24 is 7.2.
Since students cannot be represented by a decimal part, we can round the answer to the nearest integer. In this case, it is 7.
So, we can say that 7 students in Michelle's homeroom rode the bus to school.