Răspuns:
[tex] \frac{3}{10} din400 = \frac{1200}{10} = 120 [/tex]
[tex]400 + 120 = 520[/tex]
[tex] \frac{4}{5} din400 = \frac{1600}{10} = 160[/tex]
[tex]400 + 160 = 560[/tex]
[tex]25\%din400 = \frac{25}{100} \times 400 = \frac{10000}{100} = 100[/tex]
[tex]400 + 100 = 500[/tex]
