Write the next steps​

When y’all answer can y’all explain too !

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $40.00, how much money is angela saving on the dress? a. $0.80 b. $3.20 c. $32.00 d. $8.00