What will be 75% of 80?

Appeared in: RML PRE 2025

Explanation

To find 75% of 80, the percentage must be converted into a decimal or fraction and then multiplied by the number.
As a decimal, 75% is 0.75. The calculation is 0.75 × 80, which equals 60.
As a fraction, 75% is 3/4. The calculation is (3/4) × 80, which also equals 60.
Therefore, 60 is the correct value representing 75% of 80.

Option B: The value 90 is greater than the original number 80, which means it represents a percentage greater than 100%. Specifically, 90 is 112.5% of 80.
Option C: The value 180 is more than double the original number 80. It represents 225% of 80.
Option D: The value 70 is incorrect, although it is close. It represents 87.5% of 80 (70 ÷ 80 = 0.875).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculating the percentage of a given number as background academic context rather than a clinical decision trigger.
Basic numeracy, including percentage calculations, is a fundamental skill for nurses to ensure patient safety.
Nurses use percentages daily for tasks such as calculating medication dosages, determining IV fluid rates, assessing the percentage of body surface area affected by burns (Rule of Nines), and interpreting nutritional information.
For example, preparing a 75% strength solution from a stock solution requires this exact type of calculation to avoid medication errors.

How to Approach the Question

First, identify the two key numbers in the question: the percentage (75%) and the total value (80).
Understand that 'percent' means 'per hundred'. So, 75% can be written as a fraction (75/100) or a decimal (0.75).
Choose the method you prefer: decimal or fraction. For decimals, simply multiply 0.75 by 80.
For fractions, simplify 75/100 to 3/4 and then multiply (3/4) by 80.
Perform the calculation: 0.75 × 80 = 60.
Compare your result with the given options to find the correct answer.

Concept Tested & Keywords

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Practise the full RML PRE 2025

Attempt every question from this paper in a timed mock, then review the full solution for each one.