Ответ:1) 24/35:6/7 =  4/5;

2) 2 2/5/1 1/15 = 9/4;

3) 6: 12/13 = 13/2

4) 6/19 : 3 = 2/19

Пошаговое объяснение: 1) 24/35:6/7 = 24/35*7/6 = 4/5;

2) 2 2/5/1 1/15 = 12/5*15/16 = 9/4;

3) 6: 12/13 = 6*13/12 = 13/2

4) 6/19 : 3 = 6/19 * 3 = 2/19