if 50 miles, is 100%, what is 21miles off that in percent?
well [tex]\begin{array}{ccllll}
miles&\%
\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
50&100\\
21&x
\end{array}\implies \cfrac{50}{21}=\cfrac{100}{x}\impliedby \textit{solve for "x"}[/tex]
