1. Using Percents 7-10 Warm Up Problem of the Day Lesson Presentation
Course 1
Warm Up
Problem of the Day
Lesson Presentation

2. Warm Up
Find the percent of each number.
1. 75% of 300
2. 93% of 56
3. 32% of 128
4. 9% of 60
225
52.08
40.96
5.4

3. Learn to solve percent problems that involve discounts, tips, and sales tax.

4. Vocabulary
discount
tip
sales tax

5. Common Uses of Percents
Discounts
A discount is an amount that is subtracted from the regular price of an item.
discount = price • discount rate
total cost = price – discount
Tips
A tip is an amount added to a bill for service.
tip = bill • tip rate
total cost = bill + tip
Sales tax
Sales tax is an amount added to the price of an item.
sales tax = price • sales tax rate
total cost = price + sales tax

6. Finding Discounts A clothing store is having a 10% off sale
Finding Discounts A clothing store is having a 10% off sale. If Angela wants to buy a sweater whose regular price is $20.00, how much will she pay for the sweater after the discount?
Step 1: To find the amount of the discount you need to find 10% of $20.00.
Step 2: Find 10% of $20 by multiplying 0.10 • 20.
10% of 20 = 0.10 • $20.00 = $2.00
The discount will be $2.00. To find out how much she will pay after the discount you need to subtract the discount from the regular price.
$20.00 – $2.00 = $18.00
Angela will pay $18.00 for the sweater.

7. Step 1: The tip will be 18% of 7.85.
Finding Tips
Ben’s dinner bill is $7.85. He wants to leave a tip that is 18% of the bill. How much is his total with the tip?
Step 1: The tip will be 18% of 7.85.
Step 2: 18% of 7.85 = .18 x 7.85 = 1.413
1.413 rounds to 1.41 because it is money
Step 3: Ben should leave $1.41 as a tip.
Step 4: To find the total with the tip you add the tip to the bill.
$ $1.41 = $9.26.

8. Finding Sales Tax Ann is buying a dog bed for $29. 75
Finding Sales Tax Ann is buying a dog bed for $ The sales tax rate is 7%. How much will the total cost of the dog bed be?
Step 1: The tax will be 7% of $29.75.
Step 2: 7% of = .07 x =
Round to 2.08 because we are talking about money
The sales tax is $2.08. Add this amount to $29.75 to compute the total cost of the dog bed.
$ $2.08 = $31.83
Ann will pay $31.83 for the dog bed.