Answer:
$270
Step-by-step explanation:
Let x be the original price of the ring.
If the ring has been discounted by 20%, then it is now 80% of its original price, since 100% - 20% = 80%.
[tex]\implies 80\% \textsf{ of }x = \$216[/tex]
[tex]\implies \dfrac{80}{100}x = 216[/tex]
Multiply both sides by 100:
[tex]\implies \dfrac{80x}{100} \cdot 100=216 \cdot 100[/tex]
[tex]\implies 80x=21600[/tex]
Divide both sides by 80:
[tex]\implies \dfrac{80x}{80}=\dfrac{21600}{80}[/tex]
[tex]\implies x=270[/tex]
Therefore, the original price of the ring was $270.
