2. Main Idea and New Vocabulary Example 1: Find the Sale Price
Example 2: Find the Selling Price
Example 3: Find the Total Cost
Lesson Menu

3. Apply percents to find discount, markup, and sales tax.
selling price
sales tax
Main Idea/Vocabulary

4. Method 1 Find the amount of the discount first.
Find the Sale Price
SHOPPING The regular price for a computer is $1,200. This week, it is on sale for 30% off. What is the sale price?
Method 1 Find the amount of the discount first.
The percent is 30%, and the whole is 1,200. We need to find the amount of the discount, or the part. Let d represent the amount of discount.
d = 0.30 ● 1,200 Write the percent equation.
d = Multiply.
Subtract the amount of the discount from the original price to find the sale price. $1,200 – $360 = $840
Example 1

5. Method 2 Find the percent paid first.
Find the Sale Price
Method 2 Find the percent paid first.
If the amount of the discount is 30%, the percent paid is 100% – 30% or 70%. Find 70% of $1,200. Let s represent the sale price.
s = 0.70 ● 1,200 Write the percent equation.
s = Multiply.
Answer: The sale price of the computer is $840.
Example 1

6. SHOPPING The regular price for a video game system is $250
SHOPPING The regular price for a video game system is $250. This week, it is on sale for 20% off. What is the sale price?
A. $50
B. $200
C. $225
D. $230
Example 1 CYP

7. Method 1 Find the amount of the markup first.
Find the Selling Price
CLOTHING The wholesale cost for shirts bought by a sporting goods store is $20 per shirt. The shirts will be marked up 40%. What will be the selling price?
Method 1 Find the amount of the markup first.
The whole is $20. The percent is 40%. You need to find the amount of the markup, or the part. Let m represent the amount of the markup.
m = 0.40 ● 20 Write the percent equation.
m = 8 Multiply.
Add the markup $8 to the store’s cost $20 to find the selling price. $8 + $20 = $28
Example 2

8. Method 2 Find the total percent first.
Find the Selling Price
Method 2 Find the total percent first.
The customer will pay 100% of the store’s cost plus an extra 40% of the cost. Find 100% + 40% or 140% of the store’s cost. Let p represent the price.
p = 1.40 ● 20 Write the percent equation.
p = 28 Multiply.
Answer: The selling price of the shirts is $28.
Example 2

9. PETS The wholesale cost for guinea pig treats is $2. 60 per box
PETS The wholesale cost for guinea pig treats is $2.60 per box. The treats will be marked up 35% at the store. What will be the selling price?
A. $1.69
B. $2.95
C. $3.51
D. $3.95
Example 2 CYP

10. Step 1 Find the price of the stereo after the discount.
Find the Total Cost
MUSIC A stereo that costs $120 is on sale for 12% off with a sales tax of 6.5%. What is the total cost of the stereo?
Step 1 Find the price of the stereo after the discount.
Let d represent the total discount.
part = percent ● whole
d = ● Write the percent equation.
d = Multiply.
Example 3

11. Subtract the discount from the original price to find the sale price.
Find the Total Cost
Subtract the discount from the original price to find the sale price.
$120 – $14.40 = $105.60
Step 2 Find the amount of the sales tax.
Let t represent the sales tax.
part = percent ● whole
t = ● Write the percent equation.
t  Multiply.
Example 3

12. Add the sales tax to the sale price to find the total price.
Find the Total Cost
Add the sales tax to the sale price to find the total price.
$ $6.86 = $112.46
Answer: The total cost of the stereo is $
Example 3

13. ENTERTAINMENT A trampoline that costs $200 is on sale for 5% off with a sales tax of 7%. What is the total cost of the trampoline?
A. $190.00
B. $203.30
C. $208.65
D. $214.00
Example 3 CYP