This MayeleCalc guide explains the concept in plain language so you can use the related calculator with better context and confidence. Work through each section, review the practical example, and check the common mistakes before applying the result.
Percentage describes a relationship
A percentage expresses one value as a share of another. It does not automatically mean profit, markup, or margin; the meaning depends on which value is used as the base.
Markup starts with cost
Markup compares profit with cost. If an item costs $50 and the markup is 40%, the selling price is $70.
Margin starts with revenue
Margin compares profit with selling price. The same $20 profit on a $70 sale is a 28.57% margin, not 40%. Always identify the denominator before calculating.
Practical example
See the idea in action
Write the known values and identify the denominator before using a percentage. For a $20 profit on a $70 sale, margin is 20 ÷ 70 × 100 = 28.57%, while markup is 20 ÷ 50 × 100 = 40%.
Common mistakes to avoid
- ×Using the wrong value as the denominator
- ×Mixing a percentage with a decimal rate
- ×Rounding too early in a multi-step calculation
Key takeaways
- ✓Name each value before choosing the formula
- ✓Keep full precision until the final answer
- ✓Use a second method to check important results
Put the idea into practice
Open the calculator library, choose the relevant tool, and compare realistic scenarios using the method from this guide.
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