In order to calculate the unit rate, calculate the quotient in between the given fractions, just as follow:
[tex]\frac{\frac{5}{8}}{\frac{1}{6}}=\frac{30}{8}=\frac{15}{4}[/tex]as a mixed number the previous fraction becomes:
15/4 = 3 3/4
Hence, the unit rate is 3 3/4