(3 7/9 - 4 5/6) : (- 9,5) = (3 * 9 + 7)/9 - (4 * 6 + 5)/6) : ( - 95/10) = (34/9 - 29/6) * (- 2/19) =

= (- 68/18 + 87/18) * (2/19) = 19/18 * 2/19 = 2/18 = 1/9

Ответ: 1/9.