<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />

# Prices Involving Sales Tax

## Determine the sum of a number and one or more percentages of the number.

0%
Progress
Practice Prices Involving Sales Tax
Progress
0%
Prices Involving Sales Tax

Have you ever had to calculate a tip in a restaurant?

Sasha and Keith went out for lunch. Their total bill was $16.60. Both Sasha and Keith were puzzled when it came to calculating the tip. They decided to give the waiter a 15% tip. Do you know how to calculate this? What range would be an acceptable tip? This Concept is about estimate appropriate tips. You will learn how to tackle this problem. ### Guidance When you go to a restaurant, it is customary to tip the server. If you have help at the airport, it is customary to tip the server. If you have someone carry your bags at a hotel, it is customary to tip the bellhop. What is a tip? A tip is an amount of money that is given to a worker such as a waiter or waitress who performs a service for you. A common tip amount is 15% of the cost of the meal or other service. Since you don’t usually calculate a tip exactly, we can estimate the amount of a tip. Follow these steps to estimate a 15% tip Step 1: Round the total bill to the nearest whole dollar amount. Step 2: Find 10% of this amount by moving the decimal point one place to the left. Step 3: Find half of the amount you found in Step 2. This will give you 5% of the total cost. Step 4: Add the 10% amount and the 5% amount together. Take a few minutes to write these steps in your notebook. Now let’s apply these steps to a few situations. Estimate a 15% tip on a meal whose cost is$29.75.

Step 1: Round $29.75 to$30.

Step 2: 10% of

Step 3: Half of

Step 4:

A 15% tip on a meal whose cost is $29.75 is about$4.50.

Solution:

$16.00 Solution: #### Example C$55.00

Solution:

Here is the original problem once again.

Sasha and Keith went out for lunch. Their total bill was $16.60. Both Sasha and Keith were puzzled when it came to calculating the tip. They decided to give the waiter a 15% tip. Do you know how to calculate this? What range would be an acceptable tip? To figure this out, first let's round up. becomes Now take 10% of that figure. Half of that is . If we add the two together, we get an estimate of . A reasonable tip would be between . ### Guided Practice Here is one for you to try on your own. Estimate a 20% tip on a restaurant bill of$38.95.

You can start by thinking about 10% of this bill. Since that involves simply moving the decimal point, we can say that the estimate of 10% is .

Now 20% is double that.

We can say that an estimate of a 20% tip is in a range from .

### Video Review

Here is a video for review.

### Explore More

Directions: Estimate a tip of 20% for each amount.

1. A tip on $15.00 2. A tip on$28.00

3. A tip on $25.00 4. A tip on$35.00

5. A tip on $45.00 6. A tip on$50.00

7. A tip on $90.00 8. A tip on$120.00

9. A tip on $125.00 10. A tip on$110.50

11. A tip on $130.75 12. A tip on$135.50

13. A tip on $98.78 14. A tip on$89.67

15. A tip on \$100.20

### Vocabulary Language: English

Estimate

Estimate

To estimate is to find an approximate answer that is reasonable or makes sense given the problem.
Tip

Tip

A tip is an amount of money given to a person (like a server) who has performed a service. Tips for servers are commonly 15 – 20% of the total bill.