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A book originally cost $1500. (3)There was a discount of 20% during a sale.How much did the book cost during the sale?
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A book originally cost $1500. (3)There was a discount of 20% during a sale.How much did the book cost during the sale?

User VladCovaliov
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\begin{array}ll \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{20\% of 1500}}{\left( \cfrac{20}{100} \right)1500}\implies 300~\hfill \stackrel{\textit{cost of the book on sale}}{1500-300\implies 1200}

User Boone
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