Question

What is the original price of the tennis racquet if it is 30% off and the sale price is $21

Answer 1

sale price = $21

30% off is

let

x = original price

`\begin{gathered} (30)/(100)x=21 \\ 30x=2100 \\ x=(2100)/(30) \\ x=\text{ \$70} \end{gathered}`

The original price = $70