Question 3306: What is the total cost of a lunch if the check is for $11.65 and I want to leave a 15% tip?
How do you figure this type of problem out?
Answer by kgoodwin(1)   (Show Source):
You can put this solution on YOUR website! We need to take 15% of 11.65 first. Since "of" means multiply in algebra, multiply .15 by 11.65 to get the amount of the tip. That amount is 1.7475. We need to round since we are talking money. Since we round to the nearest cent, it would round to $1.75. After finding the amount of tip, we then add that to the original amount of the bill which is $11.65. The final bill would be $13.40. A formula we could use would be (amount of bill) + [(percent)x (amount of bill)] = total bill.
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