Answer :
[tex]1\ foot=12\ inches\\6\frac{2}{3}\ feet=6\frac{3}{2}\cdot12=\frac{15}{2}\cdot12=90\ inches\\\\2\frac{1}{2}=\frac{5}{2}\\\\Ratio:\\\\\frac{\frac{5}{2}}{90}=\frac{2}{5}\cdot90=\frac{180}{5}=\frac{36}{1}\\\\Ratio\ is\ equal\ 36:1[/tex]