Question

A certain alloy contains 14.25% nickel. How much nickel is there in a piece weighing 375 pounds? round to the nearest hundredth

Answer 1

Namely, what is 14.25% of 375lbs

well, if we take 375 to be 100%, how much is 14.25%?

well  $\bf \begin{array}{ccllll} amount&\%\\ \textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\ 375&100\\ x&14.25 \end{array}\implies \cfrac{375}{x}=\cfrac{100}{14.25}$

solve for "x"