Use reasoning to lead to the answer of the following question:
There are 400 students in a local high school. 50 percent are freshmen or sophomores. 1/5 of freshmen and sophomores own a pet. How many freshmen and sophomores do not own a pet?

160
Freshman / Sophomores:400(.

50) = 200 students.

Have pets:200 / 5 = 40 students.

200 - 40 = 160 do not have pets.

.

So, the final answer is 160