Final answer:
Nathan makes a profit of £7.49 from the fudge he sells, which results in a 350% percentage profit. This is calculated by dividing the profit by the cost and multiplying by 100.
Step-by-step explanation:
The question asks to calculate the percentage profit Nathan makes from selling fudge. To find this, first, we need to calculate the profit by subtracting the cost of ingredients from the total sales. The profit is £9.63 (sales) - £2.14 (cost) = £7.49. Then, to find the percentage profit, we use the formula:
Percentage Profit = (Profit / Cost) × 100
So, substituting the values we have:
Percentage Profit = (£7.49 / £2.14) × 100
Percentage Profit = 3.5 × 100 = 350%
Therefore, Nathan makes a 350% profit margin from his fudge sales at the Christmas fayre.