We know the length and width, so the width subtracted from the length will tell us how much bigger the length is.
[tex] \frac{4}{5} - \frac{5}{8} [/tex]
[tex]= \frac{32}{40} - \frac{25}{40} [/tex]
[tex]= \frac{7}{40} [/tex]
So the length is [tex] \frac{7}{40} [/tex] feet longer than the width