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

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

$\frac{155}{100}=\frac{x}{30}$

finally, solve for x

$\begin{gathered} \frac{155}{100}=\frac{x}{30} \\ \text{Multiply both sides by 30} \\ \frac{155}{100}\cdot30=\frac{x}{30}\cdot30 \\ 46.5=x \end{gathered}$

therefore, the sale price of the tray is $ 46.5