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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
