Ответ:\(5\frac{6}{7}=\frac{7\cdot5+6}{7}=\frac{41}{7}\).\(8\frac{5}{9}=\frac{9\cdot8+5}{9}=\frac{77}{9}\).Ответ: а) \(\frac{41}{7}\); б) \(\frac{77}{9}\).