Question 1124523: explain how to find the final price, including a tip or tax, by calculating the percentages separately and then using those answers to determine the outcome.
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! If the tip is 15%, one can multiply the cost by 0.15
or use the first three numbers and half of that, so if the bill is $12.00, the tip is $1.20+0.60 or $1.80.
For tax, use the percentage multiplied by the bill. For 5% tax, it is half of ten percent which is the first three numbers. $15.00 bill with 5% tax is $1.50*(1/2) or $0.75.
the final price is the cost+tax+tip. The tip is not calculated using the cost and tax, only the cost alone.
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