From one eighth of class A to class B, the number of people in the two classes is equal. It turns out that the number of people in class B is a fraction of that in class A

From one eighth of class A to class B, the number of people in the two classes is equal. It turns out that the number of people in class B is a fraction of that in class A

Set up class A with X people, transfer 1 / 8x people to class B, and class B with y people
x-1/8x=1/8x+y
6x=8y
x=3/4y
Class B is 3 / 4 of class A