The same price difference can produce two different percentages. Before comparing a markup with a margin, identify which amount each percentage uses as its denominator and which costs have been included.
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Start with one clearly defined unit
In an original simplified example, a hypothetical item has a stated unit cost of 60 units and a selling price of 80 units. The difference between price and that cost is twenty units.
The cost-based markup is 20/60 = 1/3, approximately 33.33%. The revenue-based margin is 20/80 = 25%. Both calculations refer to the same twenty-unit difference, but their comparison bases differ.
Check what happens when a percentage is applied backwards
A 25% markup on a cost of sixty produces a price of 60 × 1.25 = 75, not eighty. Conversely, to obtain a 25% margin under this simplified definition, price P must satisfy (P - 60)/P = 0.25.
Solving gives 0.75P = 60, so P = 80. Writing the equation exposes the denominator instead of relying on the word 'percentage' alone.
Do not call every difference net profit
The example uses one specified cost figure. If packaging, payment charges, fixed overheads or other expenses are omitted, the resulting difference does not automatically represent net profit.
For a student exercise, label the cost boundary explicitly. A comparison between two products is hard to interpret if one includes delivery costs and the other excludes them.
Use the numbers to support an explanation
A clear calculation names the quantity, shows its numerator and denominator, gives a reasonable rounding and states the assumptions. It should not claim that the arithmetic alone determines a suitable real-world price or predicts demand.
This original article supports general business learning relevant to CBPA interests. It is not an organiser's required pricing rule or a completed project submission. Students should independently choose and justify their own definitions, evidence and conclusions, and check current organiser information for programme requirements.
Continue reading: CBPA Business Skills: Separate Unit Revenue from Contribution.
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Official information and further reading: Source 1
