\[\boxed{\mathbf{926\ (916).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{6}{7} = \frac{18}{21} \Longrightarrow \frac{6}{7} > \frac{17}{21}\]
\[2)\ \frac{7}{12} = \frac{35}{60};\ \]
\[\text{\ \ }\frac{11}{15} = \frac{44}{60} \Longrightarrow \frac{7}{12} < \frac{11}{15}\]
\[3)\ \frac{5}{9} = \frac{35}{63};\ \ \ \ \frac{4}{7} = \frac{36}{63} \Longrightarrow \frac{5}{9} < \frac{4}{7}\]
\[4)\ 3,4 > 3,38\]
\[5)\ 0,02 > 0,019\]
\[6)\ 0,001 > 0\]