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
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Solve One-Step Inequalities
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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.
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Percent of Change
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.25 = 25% 4)1.00 -8 20
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Percent of Change Find the percentage of change from 10 yards
to 13 yards. Step 1 - ?
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Percent of Change Find the percentage of change from 10 yards
to 13 yards. 13 - 10 = 3 Step 2 - ?
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Percent of Change
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.30 = 30% 10)3.00 -30 0
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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.
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Percent of Change.15 = 15% 20)3.00 -20 100
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Percent of Change 66 feet to 26.4 feet. Do this on your
own.
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Percent of Change.6 = 60% 66)39.6 -396 0
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Percent of Change Find the percent of change in the perimeter
of the square if the sides decreased by 1 inch. 3 in.
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Percent of Change
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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.
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Percent of Change.55 9)5.0 -45 50
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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.
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Percent of Change
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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.
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Percent of Change Finding the percent of error is similar to
finding the percent of change.
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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.
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Percent of Change
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Find the percent error if the estimate was $285 and the actual
amount was $300. Do this on your own.
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Percent of Change
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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.
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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