\[\frac{3}{7} = \frac{24}{56};\ \ \frac{9}{14} = \frac{36}{56};\ \ \frac{5}{8} = \frac{35}{56};\]
\[\text{\ \ }\frac{9}{28} = \frac{18}{56}\]
\[\Rightarrow \frac{9}{14} < \frac{5}{8} < \frac{3}{7} < \frac{9}{28}.\]