Answer: I got 12% after trial an error from 15% down to 12% when i got 165$
so the origiinal price is 187.50 and the sale price was 165, so the discount is 187.50 - 165 = 22.5.
if we take 187.50 to be the 100%, what is 22.5 off of it in percentage?
[tex]\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 187.5&100\\ 22.5&x \end{array}\implies \cfrac{187.5}{22.5}=\cfrac{100}{x}\implies 187.5x=2250 \\\\\\ x=\cfrac{2250}{187.5}\implies x=12[/tex]
