namely, what is 11.65 in percentage from 24.9
if we take 24.9 to be the 100%, let's see
[tex]\bf \begin{array}{ccllll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
24.9&100\\
11.65&x
\end{array}\implies \cfrac{24.9}{11.65}=\cfrac{100}{x}[/tex]
solve for "x".