Suppose $\frac ab = \frac35$,$\frac bc=\frac{15}{8}$, and $\frac cd = 8$. What is the value of $\frac ad$? Express your answer in simplest form.
\($\frac ab = \frac35$,$\frac bc=\frac{15}{8}$, and $\frac cd = 8$\)
(a/b) (b/c) = (3/5) (15/8) = 45 / 40 = 9/8 = a / c
(a/c) (c/d) = ( 9/8) (8/1) = 9 / 1 = a / d = 9
