Надо сравнить дроби пять седьмых и одиннадцать четырнадцатых шесть седьмых и семь восьмых...

1) $\frac{5}{7}$ < <img src="https://tex.z-dn.net/?f=+%5Cfrac%7B11%7D%7B14%7D+" id="TexFormula2" title=" \frac{11}{14} " alt=" \frac{11}{14} " align="absmiddle" class="latex-formula"> т. к. $\frac{10}{14}$ <<img src="https://tex.z-dn.net/?f=+%5Cfrac%7B11%7D%7B14%7D+" id="TexFormula4" title=" \frac{11}{14} " alt=" \frac{11}{14} " align="absmiddle" class="latex-formula">

2) $\frac{6}{7}$ < <img src="https://tex.z-dn.net/?f=+%5Cfrac%7B7%7D%7B8%7D+" id="TexFormula6" title=" \frac{7}{8} " alt=" \frac{7}{8} " align="absmiddle" class="latex-formula"> т. к. $\frac{48}{56}$ < <img src="https://tex.z-dn.net/?f=+%5Cfrac%7B49%7D%7B56%7D+" id="TexFormula8" title=" \frac{49}{56} " alt=" \frac{49}{56} " align="absmiddle" class="latex-formula">

3) $\frac{11}{13}$ > $\frac{7}{24}$ т. к. $\frac{264}{312}$ > $\frac{91}{312}$