1. Applications of Percent
COURSE 2 LESSON 6-7
Applications of Percent
A video game costs $ The sales tax rate is 5.5%. Find the total cost.
Find the sales tax. Round to the nearest cent.
0.055 • = 1.92
Add the purchase price to the sales tax.
= 36.90
The total cost is $36.90.
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2. Applications of Percent
COURSE 2 LESSON 6-7
Applications of Percent
Use estimation to calculate a 15% tip for each amount.
a. $34.50
Round to the nearest dollar.
Find 10% of the bill.
0.1 • 35 = 3.5.
Find 5% of the bill. 5% is of the 10% amount.
• 3.5 = 1.75 1 2
Add 10% amount and 5% amount to get 15%.
= 5.25
A 15% tip for $34.50 is about $5.25.
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3. Applications of Percent
COURSE 2 LESSON 6-7
Applications of Percent
(continued)
b. $11.84
Round to the nearest dollar.
Find 10% of the bill.
0.1 • 12 = 1.2.
Find 5% of the bill. 5% is of the 10% amount.
• 1.2 = 0.6 1 2
Add 10% amount and 5% amount to get 15%.
= 1.8
A 15% tip for $11.84 is about $1.80.
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4. Applications of Percent
COURSE 2 LESSON 6-7
Applications of Percent
The bill for dinner is $ 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 • =
The sales tax is $1.69.
Step 2   Find the tip.
Round to the nearest dollar.
0.2 • 23 = 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
      =
      = 28.87
You will pay $28.87 for dinner.
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