Jawabanmu

2014-02-20T20:06:16+07:00
Presentase tara=(bruto-netto):bruto =(20kg-19kg):20kg =1kg:20kg =5%
2014-02-20T20:07:13+07:00
Tara=20-19=1 kg persentase tara=1/100X20=0.2 persen