Question

If you want to buy an item in a store that costs $15 and is on sale for 15% off, then how much would the item actually cost you after the discount? Round to the nearest cent.

Answer 1

It would cost you $12.75.

Explanation:

Model an equation, using c as the initial cost variable and x as the final cost, and then solve for x.

`x = (100 - 15)/(100) c \\ x = (85)/(100) (15) \\ x = (17)/(20) (15) \\ x = (17)/(4) (3) \\ x = (51)/(4) \\ x = 12.75`