\[\boxed{\text{5.370.}}\]
\[\textbf{а)}\ \frac{1}{6}\ и\ \frac{1}{4}\]
\[\frac{1}{6} = \frac{2}{12};\ \ \ \ \ \ \frac{1}{4} = \frac{3}{12}.\]
\[\textbf{б)}\ \frac{7}{9}\ и\ \frac{7}{12}\ \]
\[\frac{7}{9} = \frac{28}{36};\ \ \ \ \ \ \frac{7}{12} = \frac{21}{36}.\]
\[\textbf{в)}\ \frac{5}{12}\ и\ \frac{3}{10}\text{\ \ }\]
\[\frac{5}{12} = \frac{25}{60};\ \ \ \ \ \ \frac{3}{10} = \frac{18}{60}.\]
\[\textbf{г)}\ \frac{7}{18}\ и\ \frac{10}{27}\]
\[\frac{7}{18} = \frac{21}{54};\ \ \ \ \ \ \ \frac{10}{27} = \frac{20}{54}.\]
\[\textbf{д)}\ \frac{3}{10}\ и\ \frac{3}{14}\]
\[\frac{3}{10} = \frac{21}{70};\ \ \ \ \ \ \ \frac{3}{14} = \frac{15}{70}.\]
\[\textbf{е)}\ \frac{11}{10}\ и\ \frac{11}{15}\ \]
\[\frac{11}{10} = \frac{33}{30};\ \ \ \ \ \ \ \frac{11}{15} = \frac{22}{30}.\]
\[\textbf{ж)}\ \frac{13}{24}\ и\ \frac{8}{36}\ \]
\[\frac{13}{24} = \frac{39}{72};\ \ \ \ \ \ \ \ \frac{8}{36} = \frac{16}{72}.\]
\[\textbf{з)}\ \frac{11}{30}\ и\ \frac{7}{45}\ \]
\[\frac{11}{30} = \frac{33}{90};\ \ \ \ \ \ \ \ \frac{7}{45} = \frac{14}{90}.\]
\[\textbf{и)}\ \frac{7}{55}\ и\ \frac{9}{44}\ \]
\[\frac{7}{55} = \frac{28}{220};\ \ \ \ \ \ \ \frac{9}{44} = \frac{45}{220}.\]
\[к)\ \frac{7}{10}\ и\ \frac{777}{1\ 000};\ \]
\[\frac{7}{10} = \frac{700}{1\ 000};\ \ \ \ \ \ \ \frac{777}{1\ 000}.\]
\[л)\ \frac{43}{2\ 500}\ и\ \frac{411}{7\ 500}\ \]
\[\frac{43}{2\ 500} = \frac{129}{7\ 500};\ \ \ \ \ \frac{411}{7\ 500}.\]
\[м)\ \frac{20}{389}\ и\ \frac{41}{778}\ \]
\[\frac{20}{389} = \frac{40}{778};\ \ \ \ \ \ \ \frac{41}{778}\text{.\ \ }\]