Jawabanmu

2014-04-06T19:28:48+07:00
820.000 - 700.000 = 120.000
120.000/700.000 x 100 persen = 17,14 = 17 persen 
2014-04-06T20:08:43+07:00
Persen laba 
= laba/modal x 100%
= 820.000-700.000/700.000 x 100%
= 120.000/700.000 x 100%
= 12/70 x 100%
= 17,14%