Question

A salesman earned $115 in commissions in one week. What is his rate of commission if his sales that week totaled

$2,875?

Answer 1

if we take 2875 to be the 100%, what is 115 off of it in percentage?

`\begin{array}{ccll} amount&\%\\ \cline{1-2} 2875 & 100\\ 115& x \end{array} \implies \cfrac{2875}{115}~~=~~\cfrac{100}{x} \\\\\\ 25=\cfrac{100}{x}\implies 25x=100\implies x=\cfrac{100}{25}\implies x=4`