5/10-simplifica prin 5 = 1/2
10/15-simplifica prin 5=2/3
15/35 simplifica prin 5= 3/7
25/10 simplifica prin 5= 5/2
5/20 simplifica prin 5= 1/4
30/40 simplifica prin 5 = 6/8
75/125 simplifica prin 5= 15/25
105/55 simplifica prin 5 = 21/11
515/65 simplifica prin 5 = 103/13
200/525 simplifica prin 5 =40/105