A customer at a restaurant receives a bill for $43.20. The customer wants to leave a 15% tip. Which of the following is the total amount the customer will pay?

Question

mathmate · Answer

Move the decimal one place to the left and add half of it, i.e. 4.32+2.16=$6.48

mathmate · Answer

Round it up to 6.80 so you put down $50 and leave, no change required!

mathstudent55 · Answer

To find a percent of a number, multiply the percent by the number.
You need to change the percent to a decimal by dividing the percent buy 100, or moving the decimal point two places to the left.

Here is an example. Try to understand it, and then apply the idea to your problem.

Question: 
What is 25% of $55?

Solution:
Multiply 25% * $55
Change the percent to a decimal:
0.25 * $55
Do the multiplication:
0.25 * $55 = $13.75

In your case, once you find 15% of $43.20, you have find the amount of the tip.
To find the total amount, you need to add the amount of the tip to $43.20.

mathmate · Answer

Oh, I thought it was consumer math where  we need to do the calculations mentally!  lol