Answer:
when calculating the discounted price of an item
(You spend $42.00 on groceries, but you have a coupon for 10% off. What is the final price of your bill?)
when calculating tax
(You buy a pair of sunglasses for $49.00. The sales tax is 7%.How much do you need to pay including tax?)
when calculating the mark-up of a price
(James bought a pair of jeans for $23 . He sold it online on marks it up by 20% . How much did he profit?)
