Question

Carol Wynne bought a silver tray that originally cost $155 and was advertised at 70% off. What was the sale price of the tray?

Answer 1

the sale price of the tray is $ 46.5

Step-by-step explanation

to solve this we can use a rule of three

Step 1

Let x represent the the current price

as the discount is 70%, the current percentage would be

`\text{current percentage= 30\%}`

hence

`\begin{gathered} \text{if} \\ 155\rightarrow100\text{ \%} \\ x\rightarrow30\text{ \%} \end{gathered}`

we can make a proportion

`(155)/(100)=(x)/(30)`

finally, solve for x

`\begin{gathered} (155)/(100)=(x)/(30) \\ \text{Multiply both sides by 30} \\ (155)/(100)\cdot30=(x)/(30)\cdot30 \\ 46.5=x \end{gathered}`

therefore, the sale price of the tray is $ 46.5