Question

Solve for rate.
16 is what % of 4?

Answer 1

if we take 4 to be the 100%, what's 16 off of it in percentage?

`\begin{array}{ccll} Amount&\%\\ \cline{1-2} 4 & 100\\ 16& x \end{array} \implies \cfrac{4}{16}~~=~~\cfrac{100}{x} \\\\\\ \cfrac{1}{4} ~~=~~ \cfrac{100}{x}\implies x=400`