Решите пожалуйста многоэтажные дроби хотя бы 2

$\frac{12\frac{4}{5}\cdot 3\frac{3}{4}-4\frac{4}{11}\cdot 4\frac{1}{8}}{11\frac{2}{3}:2\frac{4}{7}} = \frac{\frac{64}{5}\cdot \frac{15}{4}-\frac{48}{11}\cdot \frac{33}{8}}{\frac{35}{3}:\frac{18}{7}} =\frac{\frac{960}{20}-\frac{1584}{88}}{\frac{245}{54}} = \frac{(960\cdot 22-1584\cdot 5)\cdot 54}{440\cdot 245} =\\\\= \frac{13200\cdot 54}{440\cdot 245} =\frac{1620}{245}=\frac{324}{49}=6\frac{30}{49}$

$\frac{2\frac{3}{8}:\frac{3}{4}+24\frac{7}{9}}{7\frac{1}{8}-157\frac{4}{5}:24}=\frac{\frac{19}{8}\cdot \frac{4}{3}+\frac{223}{9}}{\frac{57}{8}-\frac{789}{5}\cdot \frac{1}{24}}=\frac{\frac{76}{24}+\frac{223}{9}}{\frac{57}{8}-\frac{789}{120}}=\\\\= \frac{\frac{2012}{72}}{\frac{66}{120}}=27\frac{17}{18}$