Commission, Tax, Tip

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Tues. 2/12 Starter 2
1) Jamiel went to the store to buy a flat screen
TV that was on sale for 30 off. The original
price was 549. How much was the discount and how
much is the new price?
2) The newest version of a video game is listed
at 55.00. Best Buy is having a sale and has
listed the sale price as 44.00. What percent is
the discount?
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TAKE OUT A CALCULATOR
Sales Tax Leaving a Tip
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Learning Targets

• 10 I can calculate sales tax.
• B 1 2 3 A 1 2 3

I have these questions
7NS1.3
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Learning Targets

• 11 I can calculate tips.
• B 1 2 3 A 1 2 3

I have these questions
7NS1.3
5
Calculating Sales Tax

• Sales tax is calculated by multiplying the
• retail price of an item by the sales tax rate.
• METHOD 1

Example Shoes 100 Tax Rate 7
Sales Tax 100 x 0.07 7.00
Total Purchase Price 100 7.00 107
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Calculating Sales Tax

• Sales tax is calculated by multiplying the
• retail price of an item by the sales tax rate.

METHOD 2
Example Shoes 100 Tax Rate 7
Add 7 to 100 since that includes the total
price and the tax. Find 107 of 100.
107
Find total 100 x 107
Multiply 100 x 1.07
Both methods give you the same answer!
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Calculating Sales Tax
A family purchased a pool table for 825. The
sales tax rate was 7. What was the total cost?
Method 1 Add sales tax to the price 825 x 7
tax 825 x 0.07 57.75 825 57.75 882.75
Method 2 Multiply the price by 107 since 7 is
added to the cost. 825 x 107 total cost 825
x 1.07 882.75
So, the total cost of the purchase was 882.75.
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Leaving a Tip
As a courtesy it is always nice to leave a tip
when someone does something nice for you.
Many different types of professions work for tips
A pizza delivery man A waiter or waitress A
hairdresser or barber
Usually the amount of tip depends on how well you
think the service was.
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Leaving a Tip
If you get really good service at a restaurant it
is usually due to having a good waitress.
A good tip for a waitress is 18.
If the service was not as well as you liked then
you can leave a smaller tip such as 10 or 5.
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Leaving a Tip
You and a friend go to lunch. The check comes to
24.85. Figure out how much you should tip if
you want to leave 15. Make an estimate
first using benchmarks.
Find 10 of 25 2.50 Then Find 5 of
25 1.25
3.75
An estimate for the tip is about 3.75
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Leaving a Tip
You and a friend go to lunch. The check comes to
24.85. Figure out how much you should tip if
you want to leave 15.
Now solve using a calculator.
Find 15 of 24.85 Change 15 to a decimal
0.15 x 24.85
3.7275
Put your answer in a sentence The tip should
be 3.73 (is that close to our estimate of 375?)
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Whiteboard practice.

1. Find the tax on an item that costs 54 if the
   sales tax rate is 8.

2. What is the total price including the tax?
3. Find the tax on an item that costs 40 if the
tax rate is 9.25.
4. Find the total price including the tax.
5. ESTIMATE A 15 tip on a meal of 48.89.
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REMEMBER To Always Show Your Work

• Take out your Learning Targets!

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LT 10
Sales Tax
A family purchased a DVD player for 200. The
sales tax rate was 7. What was the total cost of
the purchase?
Method 2 Multiply the price by 107 since 7 is
added to the cost. 200 ? 107 total cost 200
? 1.07 214.00
Method 1 Add sales tax to the price 200 ? 7
tax 200 ? .07 14.00 tax 200 14.00 214.00
So, the total cost was 214.00.
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Tips
LT 11
Mrs. Girt earned average tips of 18 while
waiting tables at Dennys. If her sales one
night were 730, what did she make in tips?
2
730 x 0.18
Tips
0.18
730

131.40
1
0
4
8
5
0
0
3
7
3
0
4
1
1
Mrs. Girt earned 131.40 in tips that night.
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Tips
LT 11
The dinner bill at Olive Garden was 58.57 cents.
If your family wanted to leave a 15 tip for the
waiter approximately how much should they leave?
Tip 15 of 58.57
Kind of an ugly calculation!
.15
58.57
Tip
SO Use Benchmarks and Short cuts to estimate
tip Round 58.57 to 60 then take 15 by using
10 5 to get the tip.
10 of 60 6 5 of 60 3 15 of 60
9 So the tip should be about 9.

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Name___________February 12, 2013 Period___

Pg. 300 301 2, 3, 6, 7, 9 11, 21 - 24 Make
sure your show all set up for full credit! You
must set them up and can use calc to do
calculations. Does your answer make sense?