Name ________________________________________ Date ___________________ Class___________________
LESSON
2-9
Problem Solving
Percents
Use the table below, which shows the recommended daily allowance
of food components for a 2000-calorie diet, to answer questions 1–8.
Round your answers to the nearest tenth.
1. One serving of oatmeal contains 16%
of the recommended daily allowance of
fiber. How many grams of fiber are in
one serving?
Component
_________________________________________
2. A certain can of soup contains 30% of
the recommended daily allowance of
sodium. How many milligrams of
sodium are in one can?
Recommended
Daily Allowance
Total fat
65 g
Saturated fat
20 g
Cholesterol
300 mg
Sodium
2400 mg
Total Carbohydrates
300 g
Fiber
25 g
_________________________________________
3. One serving of pure Vermont maple
syrup contains 53 grams of total
carbohydrates. What percent of
the recommended daily allowance is this?
4. One serving of pumpkin pie contains 12
total grams of fat. What percent of the
recommended daily allowance is this?
_________________________________________
________________________________________
Select the best answer.
5. A certain nutrition bar contains 15%
of the recommended daily allowance of
saturated fat. How many grams of
saturated fat are in the bar?
6. One serving of plain yogurt contains 6
mg of cholesterol. What percent of the
recommended daily allowance is this?
A 2.5 g
C 4g
F 2%
H 20%
B 3g
D 5g
G 5%
J 50%
7. A cereal contains 90 mg of potassium,
and this is 3% of the recommended
daily allowance. What is the
recommended daily allowance of
potassium?
8. A slice of whole grain bread contains 7
grams of fiber. What percent of the
recommended daily allowance is this?
A 27 mg
C 300 mg
F 18%
H 28%
B 270 mg
D 3000 mg
G 25%
J 30%
Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.
2-73
Holt McDougal Algebra 1
7. 28%
8. a 30% markdown followed by a 15%
markdown
8. 26%
9. 190%
10. 3
11. 3
12. 96
13. 6.9
14. 25%
15. 8.3%
16. 79
17. 160
18. 1.7 million
9. Multiply the original amount by one minus
the decimal or fractional form of the
markdown and then multiply that amount
by one minus the decimal or fractional
form of the next markdown.
Problem Solving
19. 22%
Practice C
1. 0.705;
141
200
1
21
2. 4.2% or 4 %;
5
500
1. 4 grams
2. 720 mg
3. 17.7%
4. 18.5%
5. B
6. F
7. D
8. H
Reading Strategies
3. 152%; 1.52
4. 76%
1. 56
2. 12
5. 170
6. 306
3. 20
4. percent
1
7. 11.1% or 11 %
9
8. 1.6
5. whole
6. part
7. 40
8. 15
9. 103.3
10. 107.1 GB
11. 14.3%
12. 160.0 GB
LESSON 2–10
Practice A
Review for Mastery
1. percent; whole; 3.2
1. 3%; 795; $795
2. part; percent; whole; 40
2. 0.025; 3; 112.5; $112.50
3. percent; whole; part; 15%
3. $20; $20; $2.00; $2.00; $1.00; $3.00
4. part; percent; whole; 22.5
4. $425
5. 20%; what number; 7
6. about $1.60
6. 50%; 92; what number
5. 8%
Practice B
7. What percent; 40; 14
1. $12,000
2. $53,600
8. 65%; 80; what number
3. $1,250,000
4. $120
9. 35
5. 0.4%
6. 1.5 years
7. about $2.55
8. about $6.30
10. 5%
Challenge
1. $162.50
9. a. about $105
2. $97.50
3. 85% of $130 is $110.50, not $97.50
b. about $300
4. a 30% markup followed by a 15%
markdown
c. about $1900
Practice C
5. Multiply the original amount by one plus
the decimal or fractional form of the
markup and then multiply that amount by
one minus the decimal or fractional form
of the markdown.
6. $97.50
1. 40 years
2. $41.04
3. about $0.75
4. 3%
5. about $8.25
6. $1469.53
7. $292.00
7. $58.50
Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.
A22
Holt McDougal Algebra 1