Răspuns:
12/18=6/9=2/3
2015=4/3
24/28=6/7
14/42=2/6=1/3
30/12=15/6=5/2
25/45=5/9
32/40=4/5
36/27=4/3
28/42=14/21=2/3
48/32=6/4=3/2
b). 56/42=28/21=4/3
50/75=10/15=2/3
72/54=36/27=4/3
60/45=12/9=4/3
64/80=8/10=4/5
96/56=48/28=24/14=14/7=2
72/60=36/30=12/10=6/5
84/90=42/45=14/15
Explicație pas cu pas: