December 09, 2013

Your bill at Applebees' over the weekend came to $28.22.

Estimate a 15% tip.

Bellwork Clickers

December 09, 2013

Monday, December 9th

Today's agenda!Get your clicker!!!

1. Bell Work: Estimating tips

2. Check HW: Estimating Percents

3. Notes/Examples: Ch. 6-3

December 09, 2013

Monday, December 9th

Today's agenda!Get your clicker!!!

1. Bell Work: Clicker Assessment

2. Check HW: Estimating Percents

3. Notes/Examples: Ch. 6-3 and 6-4

December 09, 2013

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December 09, 2013

Lesson Objective:

Students will be able to identify and solve three types of percent problems as measured by the clickers.

HW: WS Three types of percent problems

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There are three percent problem types you should be able to do today

1. Finding the Percent one number is of another number

2. Finding a part

3. Finding the whole

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Method: Set up a ratio.

part whole

You answered 25 questions correct out of 30 on a math test. What percent to you receive on the test?

Finding a Percent

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45 is what percent of 225?

Missing the Percent

A. 0.2 %

B. 5%

C. 20%

D. 500%

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16 is what percent of 42?

A. 38%

B. 39%

C. 0.38%

D. 263%

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84 is what percent of 56?A. 667%

B. 1.5%

C. 150%

D. 66.7%

December 09, 2013

Alexa made 30 out of 35 free throws for the season. What percent of free throws did Alexa make?

A. 117%

B. 1.2%

C. 85.7%

D. 83.7%

December 09, 2013

Trent bought a used car for $4500. He made a down payment of $900. What percent of the purchase price is his down payment?

A. 500%

B. 20%

C. 0.2%

D. 25%

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255 8th graders said their favorite singer is Adele. 125 8th graders said their favorite singer is Katy Perry. What percent of 8th graders surveyed favor Adele? Do not round your answer. A. 49%

B. 67%

C. 33%

D. 2%

December 09, 2013

Method: Multiply or use a proportion.

part whole = %

100

You scored an 80% on your math test. If there were 30 questions on the math test how many did you get right?

Finding a Part

Percent x Whole = Part

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You scored an 80% on your math test. If there were 30 questions on the math test how many did you get right?

Finding a Percent of a number

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Finding the Percent of a Number

What is 60% of 90?

A. 150

B. 52

C. 54

D. 5400

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0.8% of 20 is what number?

A. 2

B. 16

C. 1.6

D. 0.16

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5% of 90 is what number?

A. 4

B. 4.5

C. 18

D. 450

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A. 1056 mph

B. 10.7 mph

C. 97 mph

D. 15 mph

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Elijah scored 15 points in his game against Lehman. If Tay scored 80% of the points that Elijah scored, how many points did Tay score?

A. 19 points

B. 1200 points

C. 14 points

D. 12 points

December 09, 2013

This year there are 445 eighth graders at Oakwood. Last year there were 88% as many 8th grade students at Oakwood. How many 8th grade students were at Oakwood last year?

A. 506 students

B. 392 students

C. 388 students

D. 39,160 students

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When solving a problem when the percent is greater than 100, the whole will be less than the part.

150% of 50 is what number?A. 75

B. 70

C. 33.3

D. 7500

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A. 10,804 feet

B. 12,029 feet

C. 20,329 feet

D. 21,412 feet

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Method: Set up a proportion or divide.

You scored an 80% on your math test. If you answered 48 questions correct, how many questions were on the math test?

Finding a Whole

part whole = %

100Percent x Whole = Part

December 09, 2013

Method: Set up a ratio.

You scored an 80% on your math test. If you answered 48 questions correct, how many questions were on the math test?

Finding a Percent of a number

December 09, 2013

42 is 5% of what number?

A. 2.1

B. 210

C. 840

D. 900

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8% of what number is 24?

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42 is 175% of what number?

A. 24

B. 0.04

C. 7350

D. 73.5

December 09, 2013

The king cobra can reach a length of 18 feet. This is only about 60% of the length of the largest reticulated python. Find the length of the largest reticulated python.

December 09, 2013

At football practice, Matt made 24 field goals, which was 80% of the field goals attempted. How many field goals did he attempt?

A. 27

B. 30

C. 3

D. 19

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At Oakwood Middle School there are 410 8th graders which is 48% of the school's enrollment. How many students attend Oakwood Middle School?

December 09, 2013

Grace spends 25% of her allowance on One Direction music. If Grace spends $32 on music how much money does she earn for her allowance?

A. $800

B. $100

C. $128

D. $8

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Compare - write <, >, or = .

3 70% 60% 3 58% 0.64 5

Order the numbers from least to greatest.

3 , 50% , 0.35 , 38%8

> = <

0.35, 3, 38%, 50% 8

December 09, 2013

Lesson Objective:

Students will be able to identify and solve three types of percent problems as measured by the clickers.

HW: WS Three types of percent problems

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Homework WS: Three types of percent problems

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1. What is 80% of 165? 132

2. 15% of what number is 6? 40

3. 34 is what percent of 85? 40%

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4. What is 20% of 8? 1.6

5. 50% of what number is 931? 1,862

6. 190 is what percent of 304? 62.5%

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7. What is 32% of 6350? 2032

8. 49 is what percent of 100% 49%

9. 2 is what percent of 200? 1%

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10. What is 150% of 30? 45

11. 17% of 200 is what number? 34

12. 16 is what percent of 42? 38.1%

December 09, 2013

What percent of 144 is 64?

n 64100 144

=

% part100 whole

=

n = 100 64 ÷ 144

n ≈ 44.4

Substitute

Cross Multiply and Divide

Simplify

64 is approximately 44.4% of 144.

December 09, 2013

% whole part

=

Method 2: Set up an equation.

What percent of 144 is 64?n 144 = 64n 144 = 64

144 144n = 0.4

Set up an equation.

Divide both sides by 144.

Simplify.

64 is approximately 44.4% of 144.

December 09, 2013