3/10 и 2/3=9/30 и 20/30
4/5 и 4/9= 36/45 и 20/45
1/2 и 1/7 =7/14 и 2/14
5/8 и 7/11 =55/88 и 56/88
4/25 и 9/10=8/50 и 45/58
5/6 и 4/9 =15/18 и 8/18
3/20 и 2/15 =9/60 и 8/60
3/4 и 9/10 =15/20 и 18/20
3/9 и 15/25 =75/225 и 135/225
4/6 и 6/8 =16/24 и 18/24
2/4 и 6/9 =18/36 и 24/36
21/98 и 20/84=126/588 и 140/588