Дроби
5/9:3/4
1/6:2/5
7/12:1/5
3/11:6/7
Ответ
2
5/9:3/4=20/27
1/6:2/5=5/12
7/12:1/5=35/12
3/11:6/7=7/33
1/6:2/5=5/12
7/12:1/5=35/12
3/11:6/7=7/33