Explicație pas cu pas:
b)
[tex]\frac{x}{y} = \frac{25}{100} \implies \frac{2x + y}{y} = \frac{2 \cdot 25 + 100}{100} \\ \implies \frac{2x + y}{y} = \frac{150}{100} = \bf 150\%[/tex]
c)
[tex]\frac{x}{y} = \frac{25}{100} \implies {\Big(\frac{x}{y}\Big)}^{2} = {\Big(\frac{25}{100}\Big)}^{2} \\ \implies {\Big(\frac{x}{y}\Big)}^{2} = \frac{625}{10000} \implies {\Big(\frac{x}{y}\Big)}^{2} = \frac{6.25}{100} = \bf 6.25\%[/tex]
