А)
14/21= 2/3
)18/24=3/3=1
24/15=3/5
25/35=5/5=1
81/108=9/24=1/3
2)12/51=3/1
4/26=2/13
10/90=5/45=1/5
35/45=5/5=1
15/93=5/1
3)30/42=5/6
33/39=1/1
45/51=5/1
36/60=6/6=1
50/100=5/10.
4)15/95=5/1
33/48=1/6
63/108=9/24=1/4
34/82=1/1
105/200=25/100=5/10=1/5