Ответ:
1/45 и 13/120....................8/360 и 39/360
7/10 и 13/20.....................14/20 и 13/20
7/9 и 2/3...........................7/9 и 6/9
3/5 и 4/7...........................21/35 и 20/35
11/20 и 8/15......................33/60 и 32/60
1/36 и 5/12.......................1/36 и 15/36
Пошаговое объяснение: