Slide 1

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 1. 9 is what percent of 72? 2. What percent of 96 is 24? 3. 17 is 40% of what number? 4. 80% of what number is 64?

Slide 2

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 1. 9 is what percent of 72?

Slide 3

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 1. 9 is what percent of 72? part = percent (in decimal form) x whole 9 = p 72 72 72 1 = p 8 12.5% = p.125 8)1.00 -8 20 -16 40

Slide 4

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 2. What percent of 96 is 24?

Slide 5

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 2. What percent of 96 is 24? part = percent (in decimal form) x whole 24 = p 96 96 96 1 = p 4 25% = p

Slide 6

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 3. 17 is 40% of what number?

Slide 7

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 3. 17 is 40% of what number? 17 =.40 w.40.40 42.5 = w 42.5 40)1700.0 -160 100 -80 200

Slide 8

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 4. 80% of what number is 64?

Slide 9

5 Minute Check Find. Round to the nearest tenth, if necessary. Complete in your notes. 4. 80% of what number is 64? 64 =.80 w.80.80 80 = w 80.0 80)6400.0 -640 00

Slide 10

Monday, Feb 2 Lesson 7.2.5 Percent of Change

Slide 11

Solve One-Step Inequalities

Slide 12

Slide 13

Slide 14

Slide 15

Slide 16

Slide 17

Percent of Change Objective: To understand the percent of change and percent of error.

Slide 18

Percent of Change A percent of change is a ratio that compares the change in quantity to the original amount. Write this down.

Slide 19

Percent of Change Yusuf bought a DVD recorder for $280. Now it is on sale for $210. Find the percent of change in the price. How to Find the Percent of Change. Step 1 Find the change. Changed number minus original number.

Slide 20

Percent of Change Yusuf bought a DVD recorder for $280. Now it is on sale for $210. Find the percent of change in the price. $210 - $280 = - $70 How to Find the Percent of Change. Step 1 Find the change. Changed number minus original number.

Slide 21

Percent of Change Yusuf bought a DVD recorder for $280. Now it is on sale for $210. Find the percent of change in the price. $210 - $280 = - $70 How to Find the Percent of Change. Step 2 Create a ratio with the change over the original amount.

Slide 22

Percent of Change

Slide 23

Slide 24

Slide 25

Slide 26

.25 = 25% 4)1.00 -8 20

Slide 27

Percent of Change Find the percentage of change from 10 yards to 13 yards. Step 1 - ?

Slide 28

Percent of Change Find the percentage of change from 10 yards to 13 yards. 13 - 10 = 3 Step 2 - ?

Slide 29

Percent of Change

Slide 30

Slide 31

.30 = 30% 10)3.00 -30 0

Slide 32

Percent of Change The price of a radio was $120. It is on sale for $102. What is the percent of change in the price of the radio? Do this on your own.

Slide 33

Percent of Change.15 = 15% 20)3.00 -20 100

Slide 34

Percent of Change 66 feet to 26.4 feet. Do this on your own.

Slide 35

Percent of Change.6 = 60% 66)39.6 -396 0

Slide 36

Percent of Change Find the percent of change in the perimeter of the square if the sides decreased by 1 inch. 3 in.

Slide 37

Percent of Change

Slide 38

Find the percent of change in the perimeter of the square if the sides decreased by 1 inch. What is the change in area? 3 in.

Slide 39

Percent of Change.55 9)5.0 -45 50

Slide 40

Percent of Change Use the graph shown to find the percent of change in CD sales from 2011 to 2012. Round to the nearest tenth. Do this on your own.

Slide 41

Percent of Change

Slide 42

A percent of error is a ratio that compares inaccuracy of an estimate, or amount of error, to the actual amount. Write this down. Generally, the percent of error does not determine whether it is an increase or decrease.

Slide 43

Percent of Change Finding the percent of error is similar to finding the percent of change.

Slide 44

Percent of Change Ahmed wants to practice free throws. He estimates the distance from the free throw line to the hoop and marks it with chalk. Ahmeds estimate was 13.5 feet. The actual distance should be 15 feet. Find the percent error.

Slide 45

Percent of Change

Slide 46

Find the percent error if the estimate was $285 and the actual amount was $300. Do this on your own.

Slide 47

Percent of Change

Slide 48

Each week, Mr. Jones goes to the grocery store. Mr. Jones estimates he will spend $120 when he goes to the grocery store this week. He actually spends $94. What is the percent of error rounded to the tenth? Do this on your own.

Slide 49

Percent of Change

Slide 50

Johannas parents give her $10 per week for lunch money. The costs of two sound systems were decreased by $10. The original costs of the systems were $90 and $60. Without calculating, which had the greater percent of decrease? Explain.

Slide 51

Percent of Change Johannas parents give her $10 per week for lunch money. The costs of two sound systems were decreased by $10. The original costs of the systems were $90 and $60. Without calculating, which had the greater percent of decrease? Explain. The $60 system. $10 is a greater part of $60 than $90.

Slide 52

Percent of Change Johannas parents give her $10 per week for lunch money. Without using a calculator, arrange the following from greatest to least value. Justify your answer. 20% of 100, 20% of 500, 5% of 100

Slide 53

Percent of Change Johannas parents give her $10 per week for lunch money. Without using a calculator, arrange the following from greatest to least value. Justify your answer. 20% of 100, 20% of 500, 5% of 100

Slide 54

Percent of Change Agenda Notes Homework Practice 7.2.5 Due Tuesday, Feb 3 Chapter 7.2/7.3 Test - Tuesday, Feb 10