This question is asking about the percentage of gross profit on sales. Gross profit is the difference between the revenue or turnover of a firm and the cost of goods sold. In this case, the turnover is given as ₦15,000 and the cost of goods sold is ₦10,000.

To find the percentage of gross profit on sales, we need to calculate the gross profit first. We can do this by subtracting the cost of goods sold from the turnover. In this case, the gross profit would be ₦15,000 - ₦10,000 = ₦5,000.

Now, to find the percentage, we divide the gross profit by the turnover and then multiply by 100. So, the percentage of gross profit on sales would be (₦5,000/₦15,000) * 100 = 33.3%.

Therefore, the correct answer is Option B: 33.3%.

It's important to understand the concept of gross profit and how it is calculated, as it is a key measure of a firm's profitability. Gross profit represents the amount of money a company has left after deducting the cost of producing or purchasing goods from its revenue. It does not take into account other expenses such as operating expenses or taxes.

Same here,the full workings of the question, because I got 66,6,and my option is option D.

Firm's turnover _the goods sold
15,000-10,000=5,000
5,000/15,000×100=33.3%

please how is the answer...I need a working on this question....thanks