Jawabanmu

2014-03-21T18:29:14+07:00
Harga sebenarnya 3 lusin = Rp.64.800 
harga setelah dijual = Rp. 810.000
presentasenya = Rp 810.000-Rp. 64.800 = Rp 162.000
64.800x1/100/16200=25% 
maaf kalau salah .
2014-03-21T19:02:04+07:00
Harga 3 lusin = Rp.64.800 harga setelah di jual = Rp.810.000 persenta = Rp.810.000 - Rp.64.800 =Rp.162.000 =64.800×1/100/16200 = 25%