Respuesta :

if we take 12 to be the 100%, now 15 - 12, so is 3 bucks up for the retail price, what is 3 off 12 in percentage then?

[tex]\bf \begin{array}{ccll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 12&100\\ 3&p \end{array}\implies \cfrac{12}{3}=\cfrac{100}{p}\implies p=\cfrac{3\cdot 100}{12}[/tex]

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