Ответ:46. 2/3 : 6/7 : 4/7 = 2/3 * 7/6 * 7/4 = (2 * 7 * 7) / (3 * 6 * 4) = 98/72 = 1 26/72 = 1 13/36 Ответ: 1 13/36