Download presentation

Presentation is loading. Please wait.

Published byNataly Hume Modified over 2 years ago

1
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease NS1.6 Calculate the percentage of increase and decrease of a quantity. NS1.7 Solve problems that involve discounts, markups, commissions, and profit and compute simple and compound interest. California Standards

2
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease Learning objective: Today we will solve problems that involve percent of decrease. Solve: means to find the answer NS1.7 Solve problems that involve discounts, markups, commissions, and profit and compute simple and compound interest.

3
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease APK 3 1. Let’s change 5 to a percent! Step 1: divide the denominator of the fraction into the numerator! Step 2 move the decimal two places to the right. Step 3: rejoice in the correct answer 2. Show me you know how to 3 change 4 to a percent! 60% 75%

4
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease Concept Development: The percent of decrease describes how much the original amount has been reduced. amount of difference original amount percent of decrease = The regular price of an MP3 player at Best Buy is $80. This week it is on sale for $60 which is a 25 percent decrease.

5
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease Which one shows a percent of decrease? A.You went to the store to buy a skateboard and it was $16. It is now on sale for $12. or B. You go to the store to buy a cell phone. Last week it was $65. This week it is $85.

6
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease WHY is this important! When you become employed you may need to work out a percent of decrease. It is important to know if you are getting a deal at a store. It is important because you need to know this in 7 th grade.

7
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease A pair of jeans cost $25. This week they are on sale for $20. What is the percent of decrease? amount of difference original amount 5 25 Finding percent of decrease: I do = 0.20 = 20% 5 25 From 25 to 20 is a 20% decrease. Skill 1.Find the amount of difference. (change) 2.Set up the ratio (fraction) 3.Find the decimal form. 4.Write as a percent. I do 1. 25 – 20 = 5

8
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease When Mrs. Unger went shopping she noticed that Takis were on sale at the Bridge Store. Last week they were $8. This week they are $6. What is the percent of decrease? amount of difference original amount 2 8 Finding percent of decrease: We do = 0.25 = 25% 2 8 From 8 to 6 is a 25% decrease. Skill 1.Find the amount of difference. (change) 2.Set up the ratio (fraction) 3.Find the decimal form. 4.Write as a percent. We do 1. 8 – 6 = 2

9
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease Arturo downloaded songs onto Pepe’s Ipod for $10. He then downloaded song’s onto Oscar’s Ipod for $8. What was the percent of decrease between the cost of the downloads? amount of difference original amount 2 10 Finding percent of decrease: We do = 0.20 = 20% 2 10 From 10 to 8 is a 20% decrease. Skill 1.Find the amount of difference. (change) 2.Set up the ratio (fraction) 3.Find the decimal form. 4.Write as a percent. We do 1. 10 – 8 = 2

10
Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease Closure 1.What term describes how much the original amount has been reduced? 2. Ms. Duncan wanted to buy tickets to a Giants game. At the stadium they cost $40. If she buys them online they cost $24. What is the percent of decrease? 3. What did you learn today about solving problems that involve percent of decrease? 40% decrease percent of decrease

Similar presentations

OK

Homework Helper, Page 302 1.) Mr. Nelson’s class recently took a test. He made a list of the scores. 66, 79, 76, 95, 55, 82, 60, 85, 93, 76, 63, 96, 75,

Homework Helper, Page 302 1.) Mr. Nelson’s class recently took a test. He made a list of the scores. 66, 79, 76, 95, 55, 82, 60, 85, 93, 76, 63, 96, 75,

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on content development exercises Ppt on network security Download ppt on folk dances of india Ppt on rational numbers for class 8 free download Ppt on mechanical power transmission system Ppt on object oriented programming language Ppt on rulers and buildings class 7 Ppt on important places in india Ppt on tsunami warning system to mobile phones Ppt on ethical hacking and information security