\[\boxed{\text{5.372.}}\]
\[\frac{3}{8}\ и\ \frac{5}{12}\]
\[1)\ \frac{3}{8} = \frac{9}{24};\ \ \ \ \ \frac{5}{12} = \frac{10}{24}\text{.\ }\]
\[2)\ \frac{9}{24} < \frac{10}{24}\ \ \Longrightarrow \ \ \frac{3}{8} < \frac{5}{12}\text{.\ }\]
\[\frac{11}{15}\ и\ \frac{7}{10}:\ \]
\[1)\ \frac{11}{15} = \frac{22}{30};\ \ \ \ \frac{7}{10} = \frac{21}{30}\text{.\ }\]
\[2)\ \frac{22}{30} > \frac{21}{30}\text{\ \ } \Longrightarrow \ \ \frac{11}{15} > \frac{7}{10}\text{.\ \ }\]