lesson menu main idea and new vocabulary ngsss example 1:find the sale price example 2:find the...
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Main Idea and New Vocabulary
NGSSS
Example 1:Find the Sale Price
Example 2: Find the Selling Price
Example 3: Find the Total Cost
Five-Minute Check
• Apply percents to find discount, markup, and sales tax.
• discount
• markup
• selling price
• sales tax
MA.8.A.6.4 Perform operations on real numbers (including integer exponents, radicals percents, scientific notation, absolute value, rational numbers, and irrational numbers) using multi-step and real world problems.
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 = 360 Multiply.
Subtract the amount of the discount from the original price to find the sale price. $1,200 – $360 = $840
Find the Sale Price
Answer: The sale price of the computer is $840.
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 = 840 Multiply.
A. $50
B. $200
C. $225
D. $230
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?
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?
Find 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
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.
A. $1.69
B. $2.95
C. $3.51
D. $3.95
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?
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= 0.12 ● 120 Write the percent equation.
d= 14.4 Multiply.
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 = 0.065 ● 105.60 Write the percent equation.
t 6.86 Multiply.
Find the Total Cost
Answer: The total cost of the stereo is $112.46.
Add the sales tax to the sale price to find the total price.
$105.60 + $6.86 = $112.46
A. $190.00
B. $203.30
C. $208.65
D. $214.00
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. $87.50
B. $262.50
C. $325.00
D. $437.50
A $350 grill is on sale for 25% off the original price. Find the sale price.
A. $270.00
B. $1,530.00
C. $1,620.00
D. $1,785.00
Find the sale price of a television that is regularly $1,800 and is on sale for 15% off the original price.
A. $19.50
B. $45.50
C. $84.50
D. $95.00
Find the selling price for the book given the percent of markup.book: $65, 30% markup
A. $18.00
B. $102.00
C. $135.00
D. $138.00
Find the selling price for the lamp given the percent of markup.lamp: $120, 15% markup
A. $9.80
B. $18.20
C. $20.20
D. $65.00
Find the amount of discount for a $28 shirt that is on sale for 65% off the original price.