1. Percent is a ratio out of 100 (per 100).
Cut out words above number line

2. Objective: We will solve problems involving percent.
NS 1.4: Calculate given percentages of quantities and solve problems involving discounts at sales, interest earned, and tips.

3. Prior Knowledge
What can you tell me about the word “Percent” or percent problems? Think of vocabulary, rules, strategies and information you know!
Add icons: CH (choral response), TT (think time), PS (pair-share), RS(?), CD(?) RS CD

4. Vocabulary
Example:
A pair of jeans that regularly cost $25.50 are on sale for 20% off. What is the amount of the discount?
Part
Whole
Sale Price
Discount
Retail Price
Tax Rate
___20___ = __X___
When solving a problem with a percent greater than 100%, the part will be greater than the whole

5. 4 Centers Red Robin: Total and tip Sports Authority: Percent of change
Camaro: Total with interest
Cell Phone: Amount of discount

6. Group Norms Listen to each other’s ideas.
Respect everyone’s opinion by asking for clarification.
Politely agree or disagree.
Investigate together and stay on task.
Make sure everyone in your group can explain your group’s thought process.

7. Problem _______ is similar to problem __________ because__________.
Comparison Frame
Problem _______ is similar to problem __________ because__________.

8. After receiving an outstanding report card, Lucy took her son to lunch to celebrate. Lucy ordered a Crispy Chicken Sandwich, a cup of soup and a soft drink. Her son ordered a BLTA Croissant, a side salad and a Freckled Lemonade. Lucy also left a 20% tip. How much did they spend on lunch? (Round to the nearest penny.)
Groups 1 & 5
Mom-$15.27
Son-$16.17
Tip-$6.288
Total-$37.73

9. The original price of a 54 inch glass in-ground basketball system is $1,198. On sale, the same system costs $799. What is the percent taken off of the original price?
(Round to the nearest tenth of a percent.)
Groups 2 & 6
33.3 %

10. Groups 3 & 7
$50,352
The advertised cost of a new Camaro is $48,000. After including the interest rate of 4.9%, what is the total cost of a new Camaro?

11. Find the sale price on the $99 phone with a two year contract and a 60% discount. Find the sale price on the $149 phone with a two year contract and a 68% discount.
Groups 4 & 8
$39. 60
$47.68

12. Ticket out the Door
Other than the problems we did today, in what other situations would you use percents?