Сравните числа: 6/11 и 5/9.

\[\frac{6}{11}\ и\ \ \frac{5}{9} \Longrightarrow \frac{54\ и\ 55}{99} \Longrightarrow \frac{54}{99} < \frac{55}{99} \Longrightarrow \frac{6}{11} < \frac{5}{9}.\]