Explicație pas cu pas:
[tex]31\% \: \: \frac{31}{100} \times 400 = \frac{12400}{100} = 124 \\ \\ 5\% \: \: \frac{5}{100} \times 400 = \frac{2000}{100} = 20 \\ \\ 12\% \: \: \frac{12}{100} \times 400 = \frac{4800}{100} = 48 \\ \\ 52\% \: \: \frac{52}{100} \times 400 = \frac{20800}{100} = 208[/tex]
