Răspuns :
[tex] \frac{x}{100} \times 450 = 15[/tex]
[tex] \frac{x}{10} \times 45 = 15[/tex]
[tex] \frac{45x}{10} = 15[/tex]
[tex]45x = 15 \times 10[/tex]
[tex]45x = 150[/tex]
[tex]x = \frac{150}{45} [/tex]
[tex]x = 3.(3) [/tex]
[tex]x=3.33\:\%[/tex]
[tex] \frac{x}{10} \times 45 = 15[/tex]
[tex] \frac{45x}{10} = 15[/tex]
[tex]45x = 15 \times 10[/tex]
[tex]45x = 150[/tex]
[tex]x = \frac{150}{45} [/tex]
[tex]x = 3.(3) [/tex]
[tex]x=3.33\:\%[/tex]