Помогите,запишите пять дробей равных 3/6 ,4/10,20/30,20/28

3/6 = 1/2 = 6/12 = 12/24 = 15/30 = 18/36

4/10 = 2/5 = 8/20 = 12/30 = 16/40 = 20/50

20/30 = 2/3 = 4/6 = 6/9 = 8/12 = 10/15

20/28 =10/14 = 5/7 = 15/21 = 25/35 = 30/42