1) $$\frac{7}{11} = \frac{14}{22} < \frac{15}{22}$$. Значит, $$\frac{7}{11} < \frac{15}{22}$$.
2) $$\frac{6}{7} = \frac{24}{28} > \frac{23}{28}$$. Значит, $$\frac{6}{7} > \frac{23}{28}$$.
3) $$\frac{5}{12} = \frac{15}{36}$$ и $$\frac{7}{18} = \frac{14}{36}$$. Значит, $$\frac{5}{12} > \frac{7}{18}$$.
4) $$\frac{9}{10} = \frac{81}{90}$$ и $$\frac{8}{9} = \frac{80}{90}$$. Значит, $$\frac{9}{10} > \frac{8}{9}$$.
5) $$\frac{8}{25} = \frac{240}{750}$$ и $$\frac{13}{30} = \frac{325}{750}$$. Значит, $$\frac{8}{25} < \frac{13}{30}$$.
6) $$\frac{23}{28} = \frac{161}{196}$$ и $$\frac{27}{35} = \frac{151,2}{196}$$. Значит, $$\frac{23}{28} > \frac{27}{35}$$.