45. 2 2/3 : 1 1/31

45. 2 2/3 : 1 1/31 = 8/3 : 32/31 = 8/3 * 31/32 = (8 * 31) / (3 * 32) = 248/96 = 2 56/96 = 2 7/12

Ответ: 2 7/12