Answer:
Sale price of detergent after 20% discount is $3.64
Explanation:
Regular price of box of detergent = $4.55
Discount rate = 20%
We need to calculate the sale price.
First we will find 20% of 4.55 and then subtract that amount from regular price.
Finding 20% of 4.55

So, the discount is $0.91
Sale price of Detergent = Regular Price - Discount Price
= 4.55 - 0.91
= 3.64
So, Sale price of detergent after 20% discount is $3.64