Today, everything at a store is on sale. The store offers a 20% discount. The regular price of a T-shirt is $18. What is the discount price?
The discount price can be calculated by multiplying the regular price by the discount rate.
Discount price = Regular price x Discount rate
Discount price = $18 x 0.2
Discount price = $3.60
The discount price of the T-shirt is $3.60.