1. Discounts, markups and percent of change
Friday, January 4, 2013

2. Warm up:
Solve and graph the operation on a number line: (-3) = = (-5) = Solve: 4. Find the average of the following numbers: -2, 12, -8, 15

3. Check homework
Post answers to the word problems at the end of the Wikispace homework.
Take the time to go over the problems.

4. Let’s check our work:

5. Let’s check our work:

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9. Let’s check our work:

10. Let’s check our work:

11. Let’s check our work:

12. Quick Study! Percent of change
How can you use %/100 = part/whole to find the following percent increases and decreases? 1. From 100 to From 2.0 to From 202 to From to 60.6

13. Discounts & Markups
What is a discount? A discount is the price decrease when a item goes on sale. Sale price = regular price – discount What is a markup? A markup is the amount more that they charge for an item than what they bought it for. It is how they make a profit.

14. Example 1- Discounts
Athletic shoes that regularly sell for $85.99 are on sale for 20% off. 1.Set up a proportion to help you find the discount amount. Find that amount. 2.Find the sale price and be prepared to explain how you found the sale price.

15. Example 2- Discounts
A video game that regularly sells for $39.95 is on sale for 20% off. Find the discount amount and the sale price.

16. Example 3: Discounts
Peaches that are usually priced at $2/lb are on sale for 15% off. Find the discount amount and the sale price.

17. Example 1: markups
A music store’s percent of markup is 67%. A CD costs the store $ Find the markup and how much the will charge the customer for the CD.

18. Example 2: markups
A computer store pays $6 for a computer mouse. The percent of markup is 75%. Find the markup amount and what the store will selling price of the mouse.

19. Example 3: markups
A cap that cost a retailer $5 was marked up by 75%. Find the selling price as well as the markup amount.

20. Homework
MA7+: Textbook pages 331 – 332 #1-28, evens and #29-31, all MA7: Textbook pages 326 #7-16 (all)