将下列分数按从小到大的顺序排列。 $\begin{array}{ccc} \text{Smallest} & & \text{Largest} \end{array}$

1. Compare the fractions to 1/2

$\frac{3}{7}$ is less than $\frac{1}{2}$ because half of $7$ is $3.5$, and $3 < 3.5$.
$\frac{5}{8}$ is greater than $\frac{1}{2}$ because half of $8$ is $4$, and $5 > 4$.

2. Order the fractions

Since $\frac{3}{7} < \frac{1}{2}$ and $\frac{5}{8} > \frac{1}{2}$, the order from smallest to largest is $\frac{3}{7}$, $\frac{1}{2}$, $\frac{5}{8}$.