If Regina has a discount coupon for 20%, the amount that would be taken off from her original bill is $1.44.
How do we calculate the discount?
We shall multiply the original price by the percentage discount as a decimal to calculate a discount.
Subtract this result from the original price to determine the discounted amount.
The discount on Regina's bill will be calculated by multiplying the bill amount by the percentage discount.
Given:
Discount given to Regina = 20% or 0.20.
Bill amount = $7.20
The discount = 20% of $7.20
= 0.20 * $7.20
= $1.44
Hence, Regina will get a discount of $1.44, and this amount will be taken off the original bill (so, Regina would now pay $7.20 - $1.44 = $5.76).