Răspuns :
[tex] \frac{x}{100} \times 3000 = 2400[/tex]
[tex]x \times 30 = 2400[/tex]
[tex]30x = 2400[/tex]
[tex]x = \frac{2400}{30} [/tex]
[tex]x = 80 \: \%[/tex]
[tex]x \times 30 = 2400[/tex]
[tex]30x = 2400[/tex]
[tex]x = \frac{2400}{30} [/tex]
[tex]x = 80 \: \%[/tex]