7 целых 3/5 : 6 целых 1/3 * 1 целая 7/8 - 1 целая 5/6 =

38/5 : 19/3 * 15/8 - 11/6 = 38/5 * 3/19 *15/8 - 11/6 = 9/4 - 11/6 =  (27-22 )/12 = 5/12