TEST BANK FOR CALCULATION OF DRUG
DOSAGES A WORK TEXT 12TH EDITION BY
SHEILA J OGDEN AND LINDA FLUHARTY
(ISBN 9780323826228): ALL 19 CHAPTERS
UPDATED 2026
,TABLE OF CONTENT
1. Fractions
2. Decimals
3. Percents
4. Ratios
5. Proportions
6. Metric and Household Measurements
7. Calculations Used in Patient Assessments
8. Safety in Medication Administration
9. Interpretation of the Licensed Prescriber’s Orders
10. Reading Medication Labels
11. Oral Dosages
12. Parenteral Dosages
13. Dosages Measured in Units
14. Reconstitution of Medications
15. Intravenous Flow Rates
16. Intravenous Flow Rates for Dosages Measured in Units
17. Critical Care Intravenous Flow Rates
18. Pediatric Dosages
19. Obstetric Dosages
,CHAPTER 1: FRACTIONS
This chapter introduces fractions as a fundamental mathematical concept essential for
accurate medication calculations. It covers numerator and denominator identification,
equivalent fractions, simplification, addition, subtraction, multiplication, and division of
fractions. Nurses must understand fractions to ensure precise dosage calculations, convert
measurements safely, and prevent medication errors in clinical practice.
1. A nurse must calculate ¾ of 120 mL of medication. What is the correct volume?
A. 80 mL
B. 90 mL
C. 100 mL
D. 110 mL
Correct Answer: B
Rationale: ¾ of 120 mL = 120 × ¾ = 90 mL. Other options do not reflect the correct
fractional multiplication.
2. Which fraction represents half of a whole?
A. 1/4
B. 1/2
C. 2/3
D. 3/4
Correct Answer: B
Rationale: 1/2 is the fraction representing half. The others represent different
proportions of a whole.
3. A patient’s IV order is 1/6 L of fluid. How many mL should the nurse prepare?
A. 100 mL
B. 150 mL
C. 160 mL
D. 166 mL
Correct Answer: D
Rationale: 1 L = 1000 mL; 1000 ÷ 6 = 166.6 mL, rounded to 166 mL. Other answers
are incorrect conversions.
4. Which fraction is equivalent to 2/4?
A. 1/2
B. 3/4
C. 2/3
D. 1/4
Correct Answer: A
Rationale: Simplifying 2/4 by dividing numerator and denominator by 2 yields 1/2.
Other fractions are not equivalent.
5. A nurse divides a 9 mg dose into 3 equal parts. How much per part?
A. 2 mg
B. 3 mg
C. 4 mg
D. 6 mg
Correct Answer: B
Rationale: 9 ÷ 3 = 3 mg per part. Other options do not divide the total dose equally.
6. What is the result of adding 2/5 + 1/5?
A. 1/5
B. 2/10
, C. 3/5
D. 3/10
Correct Answer: C
Rationale: Adding fractions with the same denominator: 2 + 1 = 3; denominator
remains 5 → 3/5.
7. A patient receives ¾ tablet every 6 hours. How many tablets in 24 hours?
A. 2
B. 3
C. 4
D. 6
Correct Answer: D
Rationale: 24 ÷ 6 = 4 doses; ¾ × 4 = 3 tablets. Correction: Actually ¾ × 4 = 3 tablets.
Correct Answer: C
Rationale: Multiplying dose per administration by number of doses: 0.75 × 4 = 3
tablets. Other options are miscalculations.
8. Which fraction is larger: 3/8 or 1/2?
A. 3/8
B. 1/2
C. Equal
D. Cannot determine
Correct Answer: B
Rationale: Convert to common denominator: 3/8 = 0.375; 1/2 = 0.5. 0.5 > 0.375.
9. A nurse must subtract 5/12 – 1/4. What is the result?
A. 1/6
B. 2/12
C. 3/12
D. 4/12
Correct Answer: A
Rationale: 1/4 = 3/12 → 5/12 – 3/12 = 2/12 = 1/6 simplified. Other answers are either
unsimplified or incorrect.
10. A medication order is 2 ½ mg. How is this expressed as an improper fraction?
A. 5/2
B. 4/2
C. 3/2
D. 2/5
Correct Answer: A
Rationale: 2 ½ = (2 × 2 + 1)/2 = 5/2. Other options incorrectly convert the mixed
number.
11. Which of the following represents ¾ as a decimal?
A. 0.25
B. 0.50
C. 0.75
D. 0.80
Correct Answer: C
Rationale: ¾ = 3 ÷ 4 = 0.75. Other decimals are incorrect conversions.
12. A dose of 7/8 tablet is given to 2 patients. Total tablets used?
A. 1 3/4
B. 1 5/8
C. 1 7/8
D. 2
DOSAGES A WORK TEXT 12TH EDITION BY
SHEILA J OGDEN AND LINDA FLUHARTY
(ISBN 9780323826228): ALL 19 CHAPTERS
UPDATED 2026
,TABLE OF CONTENT
1. Fractions
2. Decimals
3. Percents
4. Ratios
5. Proportions
6. Metric and Household Measurements
7. Calculations Used in Patient Assessments
8. Safety in Medication Administration
9. Interpretation of the Licensed Prescriber’s Orders
10. Reading Medication Labels
11. Oral Dosages
12. Parenteral Dosages
13. Dosages Measured in Units
14. Reconstitution of Medications
15. Intravenous Flow Rates
16. Intravenous Flow Rates for Dosages Measured in Units
17. Critical Care Intravenous Flow Rates
18. Pediatric Dosages
19. Obstetric Dosages
,CHAPTER 1: FRACTIONS
This chapter introduces fractions as a fundamental mathematical concept essential for
accurate medication calculations. It covers numerator and denominator identification,
equivalent fractions, simplification, addition, subtraction, multiplication, and division of
fractions. Nurses must understand fractions to ensure precise dosage calculations, convert
measurements safely, and prevent medication errors in clinical practice.
1. A nurse must calculate ¾ of 120 mL of medication. What is the correct volume?
A. 80 mL
B. 90 mL
C. 100 mL
D. 110 mL
Correct Answer: B
Rationale: ¾ of 120 mL = 120 × ¾ = 90 mL. Other options do not reflect the correct
fractional multiplication.
2. Which fraction represents half of a whole?
A. 1/4
B. 1/2
C. 2/3
D. 3/4
Correct Answer: B
Rationale: 1/2 is the fraction representing half. The others represent different
proportions of a whole.
3. A patient’s IV order is 1/6 L of fluid. How many mL should the nurse prepare?
A. 100 mL
B. 150 mL
C. 160 mL
D. 166 mL
Correct Answer: D
Rationale: 1 L = 1000 mL; 1000 ÷ 6 = 166.6 mL, rounded to 166 mL. Other answers
are incorrect conversions.
4. Which fraction is equivalent to 2/4?
A. 1/2
B. 3/4
C. 2/3
D. 1/4
Correct Answer: A
Rationale: Simplifying 2/4 by dividing numerator and denominator by 2 yields 1/2.
Other fractions are not equivalent.
5. A nurse divides a 9 mg dose into 3 equal parts. How much per part?
A. 2 mg
B. 3 mg
C. 4 mg
D. 6 mg
Correct Answer: B
Rationale: 9 ÷ 3 = 3 mg per part. Other options do not divide the total dose equally.
6. What is the result of adding 2/5 + 1/5?
A. 1/5
B. 2/10
, C. 3/5
D. 3/10
Correct Answer: C
Rationale: Adding fractions with the same denominator: 2 + 1 = 3; denominator
remains 5 → 3/5.
7. A patient receives ¾ tablet every 6 hours. How many tablets in 24 hours?
A. 2
B. 3
C. 4
D. 6
Correct Answer: D
Rationale: 24 ÷ 6 = 4 doses; ¾ × 4 = 3 tablets. Correction: Actually ¾ × 4 = 3 tablets.
Correct Answer: C
Rationale: Multiplying dose per administration by number of doses: 0.75 × 4 = 3
tablets. Other options are miscalculations.
8. Which fraction is larger: 3/8 or 1/2?
A. 3/8
B. 1/2
C. Equal
D. Cannot determine
Correct Answer: B
Rationale: Convert to common denominator: 3/8 = 0.375; 1/2 = 0.5. 0.5 > 0.375.
9. A nurse must subtract 5/12 – 1/4. What is the result?
A. 1/6
B. 2/12
C. 3/12
D. 4/12
Correct Answer: A
Rationale: 1/4 = 3/12 → 5/12 – 3/12 = 2/12 = 1/6 simplified. Other answers are either
unsimplified or incorrect.
10. A medication order is 2 ½ mg. How is this expressed as an improper fraction?
A. 5/2
B. 4/2
C. 3/2
D. 2/5
Correct Answer: A
Rationale: 2 ½ = (2 × 2 + 1)/2 = 5/2. Other options incorrectly convert the mixed
number.
11. Which of the following represents ¾ as a decimal?
A. 0.25
B. 0.50
C. 0.75
D. 0.80
Correct Answer: C
Rationale: ¾ = 3 ÷ 4 = 0.75. Other decimals are incorrect conversions.
12. A dose of 7/8 tablet is given to 2 patients. Total tablets used?
A. 1 3/4
B. 1 5/8
C. 1 7/8
D. 2
