Question

sarah's craft project used pieces of yarn that are 1/8 yard long. she has a piece of ynr that is 3 yards long

Answer 1

Is the question how many such pieces of yarn will she have? 

We have to divide: 3 yards by 1/8th yard:

3/$\frac{1}{8} =3*8=24$

dividing by a fraction means multiplying by its inverse!