Junior Cycle · Financial Maths
⏱ Tested in 3 exam questions since 2023
Lesson 1 of 7
JCHL Financial Maths 1: Percentages, Mark up, Margin
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- Percentage error = error/(actual value) × 100 — the actual value goes on the bottom, not the estimate
- Mark up = profit/(cost price) × 100
- Margin = profit/(selling price) × 100
- Profit = selling price − cost price
- Finding the original: if an amount is, say, 90% of the original, divide by 90 and × 100 to get 100% (the original)
Formula used
percentage error = error/(actual value) × 100
mark up = profit/(cost price) × 100
margin = profit/(selling price) × 100
profit = selling price - cost price
MUST LEARN
Most recent exam questions
- 2025 Q1(b)
- 2024 Q4(b)
- 2023 Q2(e)
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