Question

In zoe's class, 4/5 of the students have pets. of the students who have pets, 1/8 have rodents. what fraction of the students in zoe's class have pets that are rodents? qhat fraction of the students in zoe's class have pets that are not rodents?

Answer 1

Let us assume the number of student's in Zoe's class = x
Then
Number of students that have pets = 4x/5
Number of students that have rodents as pets = (1/8) * (4x/5)
= x/10
Number of students in Zoe's class
that have pets that are not rodents = (4x/5) - (x/10)
= (8x - x)/10
= 7x/10
I hope that the procedure is clear enough for you to understand and this is the answer that you were looking for.

Answer 2

Answer with explanation:

Given : The fraction of the students have pets. of the students who have pets :
`(4)/(5)`

The fraction of the students who have pets have rodents :
`(1)/(8)`

The fraction of the students who have pets that are rodents :-

`(4)/(5)*(1)/(8)=(1)/(10)`

The fraction of the students in zoe's class have pets that are not rodents :-

`(4)/(5)-(1)/(10)\\\\=(2*4-1)/(10)\\\\=(8-1)/(10)=(7)/(10)`