Five-Minute Check (over Lesson 5–5)

Main Idea and Vocabulary

Example 1:Estimate Percents of Numbers

Example 2:Estimate Percents of Numbers

Example 3:Estimate Percents of Numbers

Example 4:Real-World Example

Example 5:Estimate Percents

Example 6:Estimate Percents

Example 7:Estimate Percents

• compatible numbers

• Estimate by using equivalent fractions and percents.

Estimate Percents of Numbers

Estimate 48% of 70.

Answer: So, 48% of 70 is about 35.

2 and 70 are compatible numbers.

Interactive Lab: Estimating Percent

1. A

2. B

3. C

4. D0% 0%0%0%

A. about 25

B. about 30

C. about 36

D. about 40

Estimate 51% of 60.

Estimate Percents of Numbers

Estimate 12% of 81.

Answer: So, 12% of 81 is about 10.

1. A

2. B

3. C

4. D0% 0%0%0%

A. about 12

B. about 15

C. about 20

D. about 22

Estimate 34% of 59.

Estimate 23% of 82.

Answer: 23% of 82 is about 20.

Estimate Percents of Numbers

1. A

2. B

3. C

4. D0% 0%0%0%

Estimate 25% of 33.

A. about 5

B. about 6

C. about 7

D. about 8

POPULATION About 9% of the population of Texas lives in the city of Houston. If there are about 22 million people in the state of Texas, estimate the population of Houston.

Answer: So, the population of Houston is about 2.2 million.

9% is about 10%.

= 2.2 million

1. A

2. B

3. C

4. D0% 0%0%0%

A. about 0.17 million

B. about 1.2 million

C. about 1.7 million

D. about 3.4 million

LEFT-HANDEDNESS About 11% of the population is left-handed. If there are about 17 million people in Florida, about how many Florida residents are left-handed?

Estimate 12 out of 47 as a percent.

Answer: So, 12 out of 47 is about 25%.

Estimate Percents

1. A

2. B

3. C

4. D0% 0%0%0%

Estimate 15 out of 76 as a percent.

A. about 20%

B. about 25%

C. about 30%

D.

Estimate 41 out of 200 as a percent.

Answer: So, 41 out of 200 is about 20%.

Estimate Percents

1. A

2. B

3. C

4. D0% 0%0%0%

A. about 10%

B. about 25%

C. about 40%

D. about 50%

Estimate 58 out of 121 as a percent.

Estimate 58 out of 71 as a percent.

58 is about 60, and 71 is about 72.

Estimate Percents

Answer:

1. A

2. B

3. C

4. D0% 0%0%0%

Estimate 14 out of 47 as a percent.

A. about 25%

B.

C.

D. about 40%

1. A

2. B

3. C

0% 0%0%

(over Lesson 5-5)

A. 1.5 hours

B. 2.5 hours

C. 3.5 hours

Determine a reasonable answer. Ming estimates that she spends 20% of her 8-hour school day in the computer lab. Does she spend approximately 1.5, 2.5, or 3.5 hours in the lab?

1. A

2. B

3. C

0% 0%0%

(over Lesson 5-5)

A. 360 miles

B. 490 miles

C. 580 miles

Determine a reasonable answer. The Suarez Family is going on a 1,015 mile journey across Europe. If they have completed 48% of their journey, about how many miles have they traveled: 360, 490, or 580 miles?

1. A

2. B

3. C

0% 0%0%

(over Lesson 5-5)

A. $190

B. $250

C. $315

Determine a reasonable answer. Every month, Michelle goes to the bank and deposits 15% of her weekly paycheck into her savings account. If her paychecks are approximately $175 every week, how much money will be in her savings account after 12 weeks: $190, $250, or $315?

1. A

2. B

3. C

4. D

0% 0%0%0%

A. $33

B. $42

C. $50

D. $58

A car rental company charges a flat rate of $124.95 to rent a car for a week. If three friends decided to split the cost of the car evenly, about how much will each of them pay?

(over Lesson 5-5)