Пошаговое объяснение:
2 : 1/2 = 2 * 2/1 = 4/1 = 4
2 : 6/7 = 2 * 7/6 = 14/6 = 7/3 = 2. 1/3
2 : 12/17 = 2 * 17/12 = 34/12 = 17/6 = 2. 5/6
2 : 102/2017 = 2 * 2017/102 = 1 * 2017/51 = 39. 28/51
