г) 8 1/12 - 3 4/15 - 1 7/30

8 1/12 - 3 4/15 - 1 7/30 = 97/12 - 49/15 - 37/30 = 2425/360 - 1176/360 - 444/360 = 805/360 = 2 85/360 = 2 17/72