Question

16 is 40% of what number?

Answer 1

$\begin{array}{cccc}16&-&40\%&|divide\ both\ sides\ by\ 4\\4&-&10\%&|multiply\ both\ sides\ by\ 10\\40&-&100\%\end{array}\\\\Answer:\boxed{16\ is\ 40\%\ of\ 40}$