Jawabanmu

2014-02-27T20:54:48+07:00
5/7-3/5 = 25/35 - 21/35 = 4/35
3/4-2/7 = 21/28 - 8/28   = 13/28
4/5-2/3 = 12/15 - 10/15 =  2/15
4/7-2/5 = 20/35 - 14/35 = 6/35
18/36-1/3 = 18/36 - 12/36 = 6/36 = 1/6