Resposta :
(915-9)/99 = 906/99 = 302/33
(617-61)/90 = 556/90 = 278/45
(583-58)/90 = 525/90 =105/18 = 35/6
(583-58)/90 = 525/90 =105/18 = 35/6
-(12345 -123)/990 = -12222/990 = -679/55
(547-5)/99 = 542/99
(0312-0)/999 = 312/999 = 104 / 333 UFA!!!!