Question

Alex and Juana went on a 50 mile canoe trip with their class. On the first day they traveled 21 miles. What percent of the total distance was that.

Answer 1

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