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. How much is the discount?
The cost of the meal after the discount?
The final cost of the meal with taxes?

1) The 15%-off coupon is $3.

2) The cost of the meal after the discount is $17.

3) The final cost of the meal with taxes is $18.19.

Step:

1) To find the discount, try to find the amount of 1%, (20÷100 x 15 = 3)

2) To find the cost of the meal after discount (20-3 = 17)

3) To find the final cost, try find the taxes amount  (17÷100 x 7 + 17 = 18.19)

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