Week 13

DiscountsDiscounts

DO NOW (3 mins)PKB (Prior Knowledge Box)Topic: Discounts Misconceptions

Complete this side only. List anything that you know about the above topic.

STANDARD 7N.S. 1.7

Huskies will be able to

calculate the discount of a

quantity.

OBJECTIVE

You buy a pair of jeans at h&m that is 33% off the original price of $29. What is

the sale price?

Intro

VOCABULARY•Discount: A ________or amount of decrease in the price of an item.

• Sale price = original price - ___________

• % OF A NUMBER % OF A NUMBER • % X THE NUMBER% X THE NUMBER

KEY INFORMATION

EXAMPLEEXAMPLE30% OF $6030% OF $60= 0.30(60)= 0.30(60)= $18= $18SALE = ORIGINAL-DISCOUNTSALE = ORIGINAL-DISCOUNT = $60-$18= $60-$18 = $42= $42

Example#1

The original price of a shirt is $18. The shirt is on sale for a 20% discount.

What is the sale price of the shirt?

Let’s Try

SOLUTION

Discount = 20% of $18 Find the amount of discount.

= 0.20(18)

= 3.60

Sale price = original price - discount Use formula to find sale price.

= 18 - 3.60

= 14.40

ANSWER The sale price of the shirt is $14.40.

Try This!Find the sale price.

Original Price: $40Percent Discount: 30%

and This!Find the sale price.

Original Price: $75Percent Discount: 25%

Practice problems

Original price of concert tickets: $100.00Discount: 21%

Practice problems

Original price of a book: $18.50

Discount: 45%

Prior Knowledge Box (PKB)Topic: Discounts Misconceptions

What did you think you knew but you found out was a misconception? If you didn’t have any prior knowledge, what did you learn/ review today?

So what does it look like on the CAHSEE?

20. A CD player regularly sells for $80. It is on sale for 20% off. What is the sale price of the CD player?

A $16B $60C $64D $96

19. A pair of jeans regularly sells for $24.00. They are on sale for 25% off.

What is the sale price of the jeans?

A $6.00B $18.00C $20.00D $30.00

Exit Slip- Discounts

• Name• Date

• Period

Agenda

Homework-5 word problems (percent decrease/increase)

Find the sale price…Original price of a camera: $554.99 Discount: 48% Bring a white board marker

(DUE: P.1,3,5- Mondays and Thursday. P.2,4,6- Tuesdays and Fridays)