bruto: 40kg tara:1% neto=

bruto = 40 kg
tara = 1 %
[tex]tara \: = \frac{1}{100} \times 40 \\ tara = \frac{40}{100} = \frac{2}{5} [/tex]
neto = bruto - tara
[tex]neto = 40 - \frac{2}{5} \\ neto = \frac{200}{5} - \frac{2}{5} \\ neto = \frac{198}{5} \\ neto = 39 \frac{3}{5} \: atau \: 39.6 \: kg[/tex]