If a/b = 2 and b/c = 4/3, what is the value of c/a? Express your answer as a common fraction.
a/b = 2/1 b/c = 4/3
So
b/a = 1/2 and c / b = 3/4
(b/a) ( c/b) = c/a
(1/2) ( 3/4) = 3/8 = c/a