[tex]\displaystyle (8-2\frac{2}{7}*2\frac{11}{12}):2 \frac{2}{7}=(8-\frac{16}{7}*\frac{35}{12}):\frac{16}{7}=(8-4*\frac{5}{3})*\frac{7}{16}=(8-\frac{20}{3})*\frac{7}{16}=\\\\\frac{4}{3}*\frac{7}{16}=\frac{1}{3}*\frac{7}{4}=\frac{7}{12}[/tex]