Question

The sales tax is ​$58 on the purchase of a dining room set for ​$1450. Find the sales tax rate.

Answer 1

well, if we take $1450 as the 100%, what's $58 off of it in percentage?

`\begin{array}{ccll} amount&\%\\ \cline{1-2} 1450 & 100\\ 58& x \end{array} \implies \cfrac{1450}{58}~~=~~\cfrac{100}{x} \\\\\\ 25=\cfrac{100}{x}\implies 25x=100\implies x=\cfrac{100}{25}\implies x=\stackrel{\%}{4}`