1994 AMC 8 Question 20

Let $W,$ $X,$ $Y,$ and $Z$ be four different digits selected from the set

$$
\{1, 2, 3, 4, 5, 6, 7, 8, 9\}.
$$

If the sum $\dfrac{W}{X} + \dfrac{Y}{Z}$ is to be as small as possible, then $\dfrac{W}{X} + \dfrac{Y}{Z}$ must equal