[tex]x\% \times 160 = 128[/tex]
[tex] \frac{x}{100} \times 160 = 128[/tex]
[tex] \frac{x}{10} \times 16 = 128[/tex]
[tex] \frac{x}{10} = \frac{128}{16} [/tex]
[tex] \frac{x}{10} = 8[/tex]
[tex]x = 8 \times 10[/tex]
[tex]x = 80[/tex]
Verificare:
[tex] \frac{80}{100} \times 160 = 0.8 \times 160 = 128[/tex]
