Question

A backpack is on sale for 30% off . If the sales price is $15.75 , what is the original price to the nearest cent.

Answer 1

The otiginal price will be the 100% and the sale price will be the 100% minus the 30% so will be the 70%, so with this information we can use a rule of 3 to solve the problem so:

`\begin{gathered} x\to100 \\ 15.75\to70 \end{gathered}`

so the equation will be:

`\begin{gathered} x=(100\cdot15.75)/(70) \\ x=22.5 \end{gathered}`