MEDICAL DOSAGE CALCULATIONS: A DIMENSIONAL ANALYSIS
APPROACH
11TH EDITION (UPDATED EDITION)
CHAPTER NO. 01: REVIEW OF ARITHMETIC FOR DOSAGE CALCULATIONS
1) Write the following as a mixed number: 17/4.
1. 4 1/4
2. 4
3. 64
4. 20
Answer: 1
Explanation: Divide the numerator by the denominator or 17 ÷ 4 = 4 with 1 left over so the
answer is 4 with the 1 remainder over 4 or 4 ¼
Learning Outcome: 1.1 Changing improper to mixed form.
2) Write the following as a mixed number: 36/7.
1. 4 6/7
2. 5 1/7
3. 4 1/7
4. 5
Answer: 2
Explanation: Divide the numerator by the denominator: 36 ÷ 7 = 5 with a remainder of 1 or 5
1/7
Learning Outcome: 1.1 Changing improper to mixed form.
3) Write the following as a mixed number: 7/2.
1. 4 1/2
2. 5 1/2
3. 3 1/2
4. 3
Answer: 3
Explanation: Divide the numerator by the denominator: 7 ÷ 2 = 3 with 1 remaining or 3 1/2
,Learning Outcome: 1.1 Changing improper to mixed form.
4) Write the following number as an improper fraction: 8 5/6.
1. 53/6
2. 40/6
3. 53/8
4. 45/6
Answer: 1
Explanation: Multiply the whole number by the denominator, and add the numerator. 8 × 6 =
48 + 5 = 53. Place this number over the denominator for 53/6
Learning Outcome: 1.1 Changing mixed to improper form.
5) Write the following number as an improper fraction: 5 5/6.
1. 35/6
2. 30/6
3. 25/6
4. 41/6
Answer: 1
Explanation: Multiply the whole number by the denominator and add the numerator: 5 × 6 = 30
+ 5 = 35. Place this number over the denominator: 35/6
Learning Outcome: 1.1 Changing improper to mixed form.
6) Write the following number as an improper fraction: 8 1/3.
1. 11/3
2. 24/3
3. 8/3
4. 25/3
Answer: 4
Explanation: Multiply the whole number by the denominator and add the numerator: 8 × 3 = 24
+ 1 = 25 Place this number over the denominator: 25/3
Learning Outcome: 1.1 Changing improper to mixed form.
7) Write 0.125 as a fraction in lowest terms and as a percentage.
,1. 125/100; 1.25%
2. 25/100; 25%
3. 1/6; 12.5%
4. 1/8; 12.5%
Answer: 4
Explanation: Write one hundred twenty-five thousandths as 125/1000, and then reduce the
fraction to 1/8. Move the decimal two places to the right yielding 12.5%
Learning Outcome: 1.4 Convert between decimal numbers and fractions.
8) Write 0.2 as a fraction in lowest terms and as a percentage.
1. 1/50; 2%
2. 1/5; 20%
3. 2/100; 0.2%
4. 1/500; 0.002%
Answer: 2
Explanation: Write 2 tenths as 2/10 and reduce to 1/5. Move the decimal point 2 places to the
right yielding 20%
Learning Outcome: 1.4 Convert between decimal numbers and fractions.
9) Write 0.49 as a fraction in lowest terms and as a percentage.
1. 49/100; 49%
2. 7/15; 49%
3. 49/100; 4.9%
4. ½; 4.9%
Answer: 1
Explanation: Write 0.49 as 49/100 which cannot be reduced further. Move the decimal point 2
places to the right to yield 49%
Learning Outcome: 1.4 Convert between decimal numbers and fractions.
10) Write 0.75 as a fraction in lowest terms and as a percentage.
1. 75/100; 75%
2. 15/20; 7.5%
3. 15/20; 75%
, 4. ¾; 75%
Answer: 4
Explanation: Write 0.75 as 75/100 and reduce to ¾. Move the decimal point 2 places to the
right to yield 75%
Learning Outcome: 1.4 Convert between decimal numbers and fractions.
11) Write 0.06 as a fraction in lowest terms and as a percentage.
1. 3/50; 60%
2. 6/10; 6%
3. 3/50; 6%
4. 3/5; 6%
Answer: 3
Explanation: Write 0.06 as 6/100 and reduce to 3/50. Move the decimal point 2 places to the
right to yield 6%.
Learning Outcome: 1.4 Convert between decimal numbers and fractions.
12) Write 55% as a decimal number and a proper fraction in lowest terms.
1. 5.5; 55/100
2. 0.055; 55/1000
3. 0.55; 11/20
4. 0.0055; 11/200
Answer: 3
Explanation: Move the decimal 2 places to the left or 0.55, place 55 over 100 and reduce to
11/20
Learning Outcome: 1.7 Write percentages as decimal numbers and fractions.
13) Write 72% as a decimal number and a proper fraction in lowest terms.
1. 7.2; 72/1000
2. 7.2; 72/100
3. 0.72; 36/50
4. 0.72; 18/25
Answer: 4
Explanation: Move the decimal 2 places to the left or 0.72. Place 72 over 100 and reduce to
18/25