A birthday celebration meal is $45.80 including tax, but not the tip. Find the total cost if a 15% tip is added of the cost of the meal.

Question

Homework

Answer 1

Hi there! What you want to do here is add 15% to your total but there's a really easy way to do this.

First, you'll want to calculate 10% of the tip, then 5% after that. So, we'll first note that the total before tip is . $45.80. To calculate 10% you will multiply your total first by .10 which is what 10% equals. This will move the decimal point one space over. This gives you $4.58.

But we're still not quite done because we still need the other 5%. Since 5% is half of 10%, you essentially will need to then take half of your $4.58 to get the rest. So, divide $4.58 by 2 which gives us $2.29.

Now, add those two numbers together. $4.58 + $2.29 = $6.87.

Your tip is $6.87. However, the question is asking us what the total is. Now, what we will do is add the original total of $45.80 + $6.87 to get our final total which is $52.67.

Hope this helps!

Answer 2

What is 15% of $45.80?

You can calculate this by performing the multiplication: 45.80 * 0.15 = 6.87. This is the value of the tip alone.

If you want to calculate the total after applying the tip, you can do it in 2 ways. First, complete the step above and add it to $45.80.

$45.80 + $6.87 = $52.67

OR you can just multiple 45.80 * 1.15. This is doing the same thing, but in one smooth step. You will get the same answer.

This is assuming that the tip is applied after tax. If you are applying the tip before the tax is applied, the tax amount is going to have to be provided. Is it 6%, 10%, etc?