Question

Dave has a board that is 3 1/4 feet long then he cut 1 7/8 from the board

Answer 1

We know Dave has a board that is 3 1/4 long:

and we need to subtract 1 and 7/8 to the board. So, we have

where, we eliminated 1 and 7/8, denoted in purple color. Then, it remains 1 and 3/8, denoted in green color.

Therefore, we have obtained:

`3(1)/(4)-1(7)/(8)=1(3)/(8)`

Therefore, the answer is:

`1(3)/(8)`

which corresponds to option B