Question

Lin's father is paying for a $20 meal. He has a 15%-off coupon for the meal. After the discount, a 7% sales tax is applied. What does Lin's father pay for the meal? Explain or show your reasoning.

Answer 1

$18.19

Explanation:

20 decrease 15% =

20 × (1 - 15%) = 20 × (1 - 0.15) = 17

17 increase 7% =

17 × (1 + 7%) = 17 × (1 + 0.07) = 18.19