3 1/2 as a improper fraction is:

Given that he buys 5 sections, the total length of fabric is:

3 feet are equivalent to 1 yard. Converting 35/2 ft into yards:

16 1/2 as a improper fraction is:

There is no leftover because 33/2 yd (the amount of fabric needed) is greater than 35/6 yd (the amount of fabric purchased)