At cadillac elementary school, 2/7 of the students are in fifth grade. if 3/5 of the fifth graders ride the bus, then what fraction of the entire school represents fifth graders who ride the bus?

You can draw a diagram if it helps, but there's a way to solve the problem without the diagram.

Given what we know, we can just do
(portion of fifth grade students) * (portion of fifth grade students riding the bus).

We can do this because to find the portion of another portion we multiply the values of both portions together.