Помогите пожалуйста решите 2 примера с дробями

3. 4 1/4 * 1 3/5 : 3 2/5 = 2

1) 4 1/4 * 1 3/5 = 17/4 * 8/5 = 34/5 = 6 4/5;

2) 6 4/5 : 3 2/5 = 34/5 : 17/5 = 34/5 * 5/17 = 34/17 = 2

4. 2 7/8 * 5 1/3 : 3 5/6 = 4

1) 2 7/8 * 5 1/3 = 23/8 * 16/3 = 46/3 = 15 1/3

2) 15 1/3 : 3 5/6 = 46/3 : 23/6 = 46/3 * 6/23 =92/23 = 4

3) 4 1/4 1 3/5 : 3 3/5 = 2

1) 4 1/4  1 3/5 = 34/5
2)  34/5 : 3 3/5 = 34/5 : 17/5 = 2

4)2 8/7 5 1/3 : 3 5/6 =4

1) 2 7/8  5 1/3 = 46/3
2) 46/3 :3 5/6 = 46/3 : 23/6 = 4