12.50 % (option A)
Explanation:To convert a fraction as a percent, we will multiply the fraction by 100:
[tex]\begin{gathered} \frac{1}{8\text{ }}\text{ as a percent}\colon \\ \frac{1}{8}\text{ }\times\text{ 100 = }\frac{100}{8} \end{gathered}[/tex][tex]\begin{gathered} \text{Divide the numerator and denominator by 4:} \\ \frac{100}{4}\text{ = 25} \\ \frac{8}{4}\text{ = 2} \\ \frac{100}{8}\text{ = }\frac{25}{2} \\ \frac{25}{2}\text{ = 12 }\frac{1}{2\text{ }} \\ \\ Since\text{ it is percent, a percent sign is attached:} \\ \frac{100}{8}=\text{12 }\frac{1}{2\text{ }}\text{ \%} \end{gathered}[/tex][tex]\begin{gathered} To\text{ decimal:} \\ \frac{100}{8}\text{ = 12.5\% (option A)} \end{gathered}[/tex]