This document provides examples and explanations of markup and discount calculations. It includes equations for calculating discount and markup. Several practice problems are worked through, such as calculating the original price of an item after a given percentage discount. Students are asked to create their own markup or discount problem and solve a problem created by another group. The homework is to complete a worksheet with additional markup and discount questions.

1. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
AIM: Markup and Discount
Do Now
1.) I purchased a laptop for $700. That was
after a discount of 30% off the original
price. What was the original price?
2.) I paid $199 for an iPhone 5. Apple uses a
mark-up of 20%. How much did it cost Apple
to construct each iPhone 5 to the nearest
dollar?
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2. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
Discount
Equation for Discount:
Original price – (percent as a decimal)original price = discounted price
Markup
Equation for Mark‐up:
Original price + (percent as a decimal)original price = selling price
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3. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
Skateboard problem 1.
After a 20% discount, the price of a SuperSick skateboard is
$140. What was the price before the discount?
Skateboard problem 2.
A SuperSick skateboard costs $140 now, but its price will go up
by 20%. What will the new price be after the increase?
Follow up Question: Why are the solutions for the two
skateboard problems not the same?
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4. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
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1.) A store buys a shirt for $15.00, and then use a
percent markup of 35%. They then discount the shirt
55%; did they make a profit on the shirt?
Yes
No
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5. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
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6. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
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3.) I went to Target to buy a video game
that cost $49.99. It was on sale for 33%
off and I paid sales tax at a rate of
8.625%. How much did I spend?
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7. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
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4.) At JC Penny‛s, a pair of earrings is $500. They
have a sale that is 40% off plus an additional 25% if
you use a JC Penny‛s credit card. Let‛s suppose I use
my JC Penny‛s credit card and pay 8% in sales tax.
How much did I spend?
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8. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
Before You Leave
1.) Create a mark-up or discount
problem with your partner.
2.) Trade with another partnership
and solve their problem.
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9. Day 4 Mark­Up and Discount Day 2.notebook February 13, 2013
Homework
Homework Sheet
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