3/5-4/7=21/35-20/35=1/35<1
16/17-5/34=32/34-5/34=27/34<1
5/12-7/24=10/24-7/24=3/24=1/8<1
5/6-7/9=45/54-42/54=3/54<1
7/9-5/7=49/63-45/63=4/63<1
4/11-2/7=27/77-22/77=5/77<1
3/5-4/7=21/35-20/35=1/35<1
16/17-5/34=32/34-5/34=27/34<1
5/12-7/24=10/24-7/24=3/24=1/8<1
5/6-7/9=45/54-42/54=3/54<1
7/9-5/7=49/63-45/63=4/63<1
4/11-2/7=27/77-22/77=5/77<1