Verified answer

[tex] {8}^{ \frac{2}{3} } - ( - 3 \frac{3}{8} {)}^{ - \frac{1}{3} } - ( - 3 {)}^{ - 1} - ( - \sqrt{3} {)}^{ - 2} + 0.25 {}^{ - 1} = \sqrt[3]{ {8}^{2} } + (\frac{27}{8} ){}^{ - \frac{1}{3} } + \frac{1}{3} + ( \frac{1}{ \sqrt{3} } {)}^{2} = \sqrt[3]{64} + (\frac{8}{27} {)}^{ \frac{1}{3} } + \frac{1}{3} + \frac{1}{3} = 4 + \sqrt[3]{ \frac{8}{27} } + \frac{1}{3} + \frac{1}{3} = 4 + \frac{2}{3} + \frac{1}{3} + \frac{1}{3} = \frac{12 + 2 + 1 + 1}{3} = \frac{16}{3} = 5 \frac{1}{3} [/tex]

И находим 12% от числа 5 1/3

[tex]5 \frac{1}{3} \: \: \: - \: \: \: 100\% \\ x \: \: \: - \: \: \: 12\%[/tex]

[tex]x = 12 \times 5 \frac{1}{3} \div 100 = 12 \times \frac{16}{5} \times \frac{1}{100} = \frac{192}{5} \times \frac{1}{100} = \frac{48}{125} [/tex]