(2 3/8 - 1 5/6) : (-1 5/8) =
= (2 9/24 - 1 20/24) : (-1 15/24) =
= 13/24 : (-1 15/24) = 13/24 : (-39/24) = - (13 × 24 / 39 × 24) = - 1/3
ответ: -1/3
