Ta có
\(\frac{11}{8}=\frac{110}{80}\)
\(\frac{11}{7}=\frac{110}{70}\)
Mà \(\frac{110}{80}< \frac{110}{79};\frac{110}{78};\frac{110}{76};...;\frac{110}{71}< \frac{110}{70}\)
Vậy \(\frac{11}{8}< \frac{110}{79};\frac{55}{39};\frac{110}{77};...;\frac{110}{71}< \frac{11}{7}\)