&&66
NS 1.2*53F
Interpret)LQGDSHUFHQWRIDTXDQWLW\DVDUDWHSHUHJRID
percents as part of a hundred; find decimal and
TXDQWLW\PHDQVWLPHVWKHTXDQWLW\VROYHSUREOHPVLQYROYLQJ¿QGLQJWKHZKROH
percent equivalents for common fractions; explain why they
JLYHQDSDUWDQGWKHSHUFHQW
represent the same value; and compute a given percent of a
whole number.
UNDERLYING SKILLS AND CONCEPTS:
understand the meaning of percent;
use decimal place value
Find Percent and Decimal Equivalents
You can write a percent as a decimal.
Remember: Percent means “parts out
of one hundred.”
You can describe
the shaded area as
25
or
25% or 0.25.
100
So, 25% means 25 out of 100.
25 out of 100 ! 25 hundredths ! 0.25.
E x am p l E
1
What percent of a dollar is 5 cents?
There are 100 cents in one dollar.
Five hundredths means
there are no tenths.
Write 5% as 0.05.
5 cents is 5 out of 100, or 5%.
E x am p l E
E – © CSL Associates, Inc. All rights reserved.
You can write 5% as 0.05.
2
What percent of a dollar is 33 cents?
33¢ out of 100¢, or 33%.
E x am p l E
33¢ out of 100¢ ! 33%.
3
Write 0.01 as a percent.
0.01 is one hundredth, or 1 out of 100.
So, 0.01 is the same as 1%.
page 266
Chapter 23 – Lesson 1
Name
P RAC T I C E
Write each decimal as a percent.
1. 0.45
45%
2. 0.07
7%
3. 0.99
99%
4. 1.00
100%
5. 0.05
5%
6. 0.20
20%
7. 0.2
20%
8. 0.5
50%
9. 0.75
75%
Write each percent as a decimal.
10. 4%
0.04
11. 33%
12. 100% 1.00 or 1
13. 8%
0.08
14. 40% 0.40 or 0.4 15. 80% 0.80 or 0.8 16. 2%
0.02
17. 20%
0.20
18. 50% 0.50 or 0.5 19. 35%
0.35
20. 10%
0.10
21. 1%
0.01
0.21
0.09
24. 6%
0.06
25. 18%
0.18
22. 21%
E – © CSL Associates, Inc. All rights reserved.
0.33
23. 9%
Circle the correct choice. Explain how you decided.
26. 8 out of 10 students like chocolate chip 27. Which pair of values is
ice cream. What percent of students like
chocolate chip ice cream?
A.
B.
C.
D.
80%
100%
8%
10%
Math
Reasoning
NOT equivalent?
A.
B.
C.
D.
10% and 0.1
10% and 0.10
10% and 1.0
10% and 0.100
Comparing Percents
MR 2.3, 2.6
True or false. Explain how you decided.
28. 20 out of 50 students rode the bus to school. 40% of the students rode the bus.
True. 20 out of 50 is the same as 4 tenths or 40 hundredths,
or 40%.
Chapter 23 – Lesson 1
page 267
MCX94.HW.CL.G5.FM&Lesson.v211
8/2/04
18:03
Page 178
Name
…at home!
P RAC T I C E
1. 0.38
38%
2. 0.09
9%
3. 0.27
27%
4. 0.01
1%
5. 0.04
4%
6. 0.88
88%
7. 0.3
30%
8. 0.4
40%
9. 0.95
95%
Write each percent as a decimal.
10. 5%
0.05
11. 44%
12. 16%
0.16
13. 12%
0.12
14. 50% 0.50 or 0.5 15. 60% 0.60 or 0.6 16. 22%
0.22
17. 17%
0.17
18. 30% 0.30 or 0.3 19. 28%
0.28
20. 44%
0.44
21. 2%
0.02
0.51
0.08
24. 19%
0.19
25. 24%
0.24
22. 51%
23. 8%
0.44
Circle the correct choice. Explain how you decided.
26. 6 out of 10 students like peanut butter
27. Which pair of values is
fudge ice cream. What percent of students
like peanut butter fudge ice cream?
A.
B.
C.
D.
60%
100%
6%
40%
Math
Reasoning
NOT equivalent?
A.
B.
C.
D.
20% and 0.2
20% and 0.20
20% and 2.0
20% and 0.200
Comparing Percents
MR 2.3, 2.6
True or false. Explain how you decided.
28. 30 out of 50 students rode the bus to school. 60% of the students rode the bus.
True. 30 out of 50 is the same as 3 fifths or 6 tenths or
60 hundredths, or 60%.
page 178
Home Resource and Homework
Chapter 23 Lesson 1
E – © CSL Associates, Inc. All rights reserved.
Write each decimal as a percent.
MCX94TEG5CH01_32.v7.4.2 2/24/01 19:49 Page 491
Name
P RAC T I C E
Write each decimal as a percent.
1. 0.45
45%
2. 0.07
7%
3. 0.99
99%
4. 1.00
100%
5. 0.05
5%
6. 0.20
20%
7. 0.2
20%
8. 0.5
50%
9. 0.75
75%
Write each percent as a decimal.
10. 4%
0.04
11. 33%
12. 100% 1.00 or 1
13. 8%
0.08
14. 40% 0.40 or 0.4 15. 80% 0.80 or 0.8 16. 2%
0.02
17. 20%
0.20
18. 50% 0.50 or 0.5 19. 35%
0.35
20. 10%
0.10
21. 1%
0.01
0.21
0.09
24. 6%
0.06
25. 18%
0.18
22. 21%
E – © CSL Associates, Inc. All rights reserved.
0.33
23. 9%
Circle the correct choice. Explain how you decided.
26. 8 out of 10 students like chocolate chip 27. Which pair of values is
ice cream. What percent of students like
chocolate chip ice cream?
A.
B.
C.
D.
80%
100%
8%
10%
Math
Reasoning
NOT equivalent?
A.
B.
C.
D.
10% and 0.1
10% and 0.10
10% and 1.0
10% and 0.100
Comparing Percents
MR 2.3, 2.6
True or false. Explain how you decided.
28. 20 out of 50 students rode the bus to school. 40% of the students rode the bus.
True. 20 out of 50 is the same as 4 tenths or 40 hundredths,
or 40%.
Chapter 23 – Lesson 1
Student Book Page
page 267
Name
…at home!
P RAC T I C E
1. 0.38
38%
2. 0.09
9%
3. 0.27
27%
4. 0.01
1%
5. 0.04
4%
6. 0.88
88%
7. 0.3
30%
8. 0.4
40%
9. 0.95
95%
Write each percent as a decimal.
10. 5%
0.05
11. 44%
12. 16%
0.16
13. 12%
0.12
14. 50% 0.50 or 0.5 15. 60% 0.60 or 0.6 16. 22%
0.22
17. 17%
0.17
18. 30% 0.30 or 0.3 19. 28%
0.28
20. 44%
0.44
21. 2%
0.02
0.51
0.08
24. 19%
0.19
25. 24%
0.24
22. 51%
23. 8%
0.44
Circle the correct choice. Explain how you decided.
26. 6 out of 10 students like peanut butter
27. Which pair of values is
fudge ice cream. What percent of students
like peanut butter fudge ice cream?
A.
B.
C.
D.
60%
100%
6%
40%
Math
Reasoning
NOT equivalent?
A.
B.
C.
D.
20% and 0.2
20% and 0.20
20% and 2.0
20% and 0.200
Comparing Percents
MR 2.3, 2.6
True or false. Explain how you decided.
28. 30 out of 50 students rode the bus to school. 60% of the students rode the bus.
True. 30 out of 50 is the same as 3 fifths or 6 tenths or
60 hundredths, or 60%.
page 178
Home Resource and Homework
Chapter 23 Lesson 1
E – © CSL Associates, Inc. All rights reserved.
Write each decimal as a percent.