Lyra bought a pair of shoes at a 20% discount.  If she paid $480, how much was the original price of the pair of shoes?
Lyra only paid $480 for the pair of shoes which is only 100% - 20% = 80% of the original price.
So let x be the original price.
Then 0.8x = $480.
Thus x = $480 / 0.8 = $
<gadget id="calculator">480/0.8</gadget>
<output>600</output>
600.

<result>600</result>