[tex]\bf \begin{array}{ccllll}
sugar&flour\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
2\frac{1}{2}&\frac{2}{5}\\\\
x&1
\end{array}\implies \cfrac{2\frac{1}{2}}{x}=\cfrac{\frac{2}{5}}{1}[/tex]
solve for "x"