Jawabanmu

2014-08-31T17:31:05+07:00
7/12 = 0,5
5/4 = 1,25
0,5 - 1,25 = -0,75
2014-08-31T17:34:10+07:00
7/12 - 5/4 = 7/12 - 15/12 = -8/12 = -2/3