\[- \frac{1}{7} > - 0,26 \Longrightarrow - \frac{1}{7} > - \frac{26}{100} \Longrightarrow\]
\[\Longrightarrow - \frac{1}{7} > - \frac{13}{50} \Longrightarrow\]
\[\Longrightarrow - \frac{50}{350} > - \frac{91}{350}\]