I do not know which formula to use

Carla bought a dress at a sale for 20% off the original price. The sale price of the dress was $68.90. Find the original price of the drees, in dollars.


Step by step explanation please.

I do not know which formula to use Carla bought a dress at a sale for 20 off the original price The sale price of the dress was 6890 Find the original price of class=