Question

Mr. Barber used 7/8 yard of wire to put up a ceiling fan. He used 1/4 yard of wire to fix a switch.

Answer 1

he has 5/8 yard of wire left because you turn 1/4 into 2/8 then, you subtract 2/8 from 7/8 and get 5/8

Answer 2

He would have used 9/8 or 1 and 1/8 yard of wire. :)