Explicație pas cu pas:
27:30=9:10
24:30=4:5
20:25=4:5
14:28=1:2
9:12=3:4
18:30=3:5
3:12=1:4
10:25=2:5
8:16=1:2
5:25=1:5
7:14=1:7
2:8=1:4
8:80=1:10
9:45=1:5
7:21=1:3
3:6=1:2
10:15=2:3
21:30=7:10
6:12=1:2
5:15=1:3
7:14=1:2
18:27=2:3
18:90=2:10=1:5
9:18=1:2
20:40=1:2
3:9=1:3
6:8=3:4
12:18=2:3
