Ответ:50. 13/14 : 7/26 : 3/8 = 13/14 * 26/7 * 8/3 = (13 * 26 * 8) / (14 * 7 * 3) = 2704/294 = 9 70/294 = 9 5/21 Ответ: 9 5/21