Dinner at your favorite restaurant costs $64.50 with tax for you and your family. You give the waiter $75 to pay the bill and a tip. What is the approximate percentage of the tip?
The total bill including tip is $75, and the amount before the tip is $64.50, so the tip is:
$75 - $64.50 = $10.50
To find the approximate percentage of the tip, divide the tip amount by the amount before the tip:
$10.50 / $64.50 ≈ 0.163 = 16.3%
Therefore, the approximate percentage of the tip is 16.3%.