Сократите дроби 12/18,,24/40,24/40,28/35,15/35,21/49,12/54,24/42,36/45,14/63

12/18=4/6,
24/40=3/5,
28/35=4/5,
15/35=3/7,
21/49=3/7,
12/54=4/18,
24/42=4/7,
36/45=4/5,
14/63=2/7
надеюсь,не ошиблась..