11 Вычислите: rac{27}{34} : (rac{3}{22} + rac{4}{33})

1. НОК(22, 33) = 66. 2. rac{3}{22} + rac{4}{33} = rac{3 · 3}{66} + rac{4 · 2}{66} = rac{9+8}{66} = rac{17}{66}. 3. rac{27}{34} : rac{17}{66} = rac{27}{34} · rac{66}{17} = rac{1782}{578} = rac{891}{289}