Hu goes out for lunch, and the price of the meal is $45. The sales tax on the meal is 6%, and the family leaves a 20% tip. What is the total cost of the meal?

Question

Please answer with whole number or decimal. Evolves prevents, I need the answer soon!

Answer 1

Hi Rachel,

 

I hope you are catching on a bit here.  We can do this problem a few different ways.  The first way shows each step, and might be easier to understand.  The second way is a more sophisticated shortcut.

 

We could do this in steps:

• Meal = $45
• Tax =  6% of 45, or .06*45=$2.70
• Meal + Tax = $45 + $2.70 = $47.70
• Tip = 20% of $47.70, or .2*47.70 = $9.54
• TOTAL = Meal + Tax + Tip = $45+$2.70+$9.54 = $57.24

 

The shortcut works like this:

• Meal + Tax = 100% (of Meal) +6% (of Meal) = 106% (of Meal), or 1.06*meal
• Meal + Tax + Tip = 100% (of Meal + Tax) + 20% (of Meal + Tax) = 120% (of Meal + Tax) = 1.2*(meal+tax)
• The above steps are to explain where this ONE AND ONLY step comes from:
• Meal + Tax + Tip = 1.2*1.06*45 = $57.24

 

Answer 2

Hi Rachel,

 

45*1.06*1.2=57.24

 

I hope this helps