Question

a cookie recipe calls for 2 1/2 cups of sugar for every 2/5 cup of flour. if you made a batch of cookies using 1 cup of flour how many cups of sugar would you need?

Answer 1

`\bf \begin{array}{ccllll} sugar&flour\\ \textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\ 2(1)/(2)&(2)/(5)\\\\ x&1 \end{array}\implies \cfrac{2(1)/(2)}{x}=\cfrac{(2)/(5)}{1}`

solve for "x"