we have
[tex]\begin{gathered} \frac{55}{x}=\frac{5}{6} \\ \end{gathered}[/tex]solve for x
[tex]\begin{gathered} x\times\frac{55}{x}=\frac{5}{6}\times x \\ 55=\frac{5}{6}x \\ 55\times\frac{6}{5}=\frac{5}{6}x\times\frac{6}{5} \\ x=\frac{330}{5}=66 \end{gathered}[/tex]answer: B. 66
