3/8:1/4
4/11:4/13
22/23:11
14:28/31
9целых 5/7:1 целую 23/28
6целых 6/11:1 целую 2/7

4/11:4/13=4/11*13/4=13/11=1 2/11 22/23:11=22/23*1/11=2/23 14:28/31=14*31/28=31/2=15 1/2 9 5/7:1 23/28=68/7*28/51=272/51=5 1/3 6 6/11:1 2/7=72/11*7/9=56/11=5 1/11