Final answer:
To find the discount on the sofa, subtract the sale price from the regular price.
Step-by-step explanation:
To find the sale price of an item, we can use the formula:
Sale Price = Regular Price - Discount
In this case, the regular price of the sofa is $440 and the sale price is $334.40. To find out the discount, we subtract the sale price from the regular price:
Discount = Regular Price - Sale Price
Discount = $440 - $334.40 = $105.60
Therefore, the discount on the sofa is $105.60.