Answer:
(a) the first store
regular price=$450
discount percentage=30%
amount of money that reduced= $450*(30/100)=$135
sale price=$450-$135=$315
Ans: sale price after discount is $315
(b) the second store
regular price=$390
discount percentage=20%
amount of money that reduced=$390*(20/100)=$78
sale price=$390-$78=$312
Ans: sale price after discount is $312
Explanation:
base of percentage is 100 so we divided the discount percentage with 100 and multiply with original price to find out how much money is reduced from original price by discount. And subtract the discount price from the original price to get the sale price.