# Applications of Percent_6-7a_

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```					COURSE 2 LESSON 6-7

Applications of Percent
A video game costs \$34.98. The sales tax rate is 5.5%.
Find the total cost.

0.055 • 34.98 = 1.9         Find the sales tax. Round to the nearest cent.

34.98 + 1.92 = 36.90        Add the purchase price to the sales tax.

The total cost is \$36.90.

6-7
COURSE 2 LESSON 6-7

Applications of Percent
Use estimation to calculate a 15% tip for each amount.
a. \$34.50
34.50     35           Round to the nearest dollar.

0.1 • 35 = 3.5.          Find 10% of the bill.
1
• 3.5 = 1.75          Find 5% of the bill. 5% is 1 of the 10% amount.
2                                                2
3.5 + 1.75 = 5.25            Add 10% amount and 5% amount to get 15%.

A 15% tip for \$34.50 is about \$5.25.

6-7
COURSE 2 LESSON 6-7

Applications of Percent
(continued)

b. \$11.84
11.84    12           Round to the nearest dollar.

0.1 • 12 = 1.2.          Find 10% of the bill.
1
• 1.2 = 0.6          Find 5% of the bill. 5% is 1 of the 10% amount.
2                                               2
1.20 + 0.6 = 1.8            Add 10% amount and 5% amount to get 15%.

A 15% tip for \$11.84 is about \$1.80.

6-7
COURSE 2 LESSON 6-7

Applications of Percent
The bill for dinner is \$22.58. The sales tax is 7.5%, and
you want to leave a tip of about 20%. How much will you pay?
Step 1       Find the sales tax.
0.075 • 22.58 = 1.6935
The sales tax is \$1.69.
Step 2       Find the tip.
22.58 23                      Round to the nearest dollar.
0.2 • 23 = 4.6                Find 20% of the bill.
The tip is \$4.60
Step 3       Add the tax and tip to the bill to find the total.
total = food bill + tax + tip
= 22.58 + 1.69 + 4.60
= 28.87
You will pay \$28.87 for dinner.

6-7

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