if we take 86 to be the 100%
the decrease was 86 - 59, or 27
so, what is 27 of 86, in percentage?
well \(\bf \begin{array}{ccllll}
amount&\%\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
86&100\\
27&x
\end{array}\implies \cfrac{86}{27}=\cfrac{100}{x}\)
solve for "x"
