1.
[tex]4 - 100\% \\ 5 - x \\ \\ x = \frac{5 \times 100}{4} = 5 \times 25 = 125\% \\ \\ 125\% - 100\% = \boxed{ 25\%}[/tex]
2.
[tex]x + x + 6x = 8x - calosc[/tex]
[tex]8 - 100\% \\ 6 - x \\ \\ x = \frac{6 \times 100}{8} = \frac{600}{8} = \boxed{75\%}[/tex]
