Question

Seth buys last year's best-selling novel, in hardcover, for $21.75. This is with a 25% discount from the original price. What was the original price of the novel?

Answer 1

Price after the 25% discount: $21.75

This means that $21.75 is 75% of the original price. If x is the original price, then:

`\begin{gathered} 75\text{\% of }x=21.75 \\ (75)/(100)\cdot x=21.75 \\ x=(100\cdot21.75)/(75) \\ \Rightarrow x=\text{ \$}29 \end{gathered}`