A family went out to dinner. The cost of their meal was $689, before sales tax and tip. A sales tax of 8% was added. The family then tipped 20% on the amount after the sales tax was added.

Part A
What was the amount, rounded to the nearest cent, of just the sales tax?

Part B
What was the total amount the family paid, including tax and tip, rounded to the nearest cent?

The family paid $55.12 in sales tax. TOTAL= $148.82 + $55.12

Step-by-step explanation:

IMPORTANT FORMULA: To convert a percent to a number, you need to divide by 100.

Therefore, 8% = 8/100 = 4/50 = 2/25

The family paid a total of $689 without sales tax or tips.

8% of $689 would equal the amount that the family paid for sales tax.

We already found what 8% is equal to and keep in mind that the word "of" means multiplication.

2/25 * $689 = sales tax

$55.12 = sales tax  

PART B) Now we have to find the total amount the family paid.

We have to add $689 with sales tax and tips.

We have to find tips.

Using the formula To convert a percent to a number, you need to divide by 100.

20% = 20/100 = 2/10 = 1/5

1/5 * ($689 + $55.12) = tips

tips = $148.82

TOTAL= $148.82 + $55.12

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