If the purchasing price of an article is 80% of its selling price, then the profit percentage is:

Let selling price = ₹100

Given, purchasing price = $80%$ of selling price

So, cost price = $\frac{80}{100} \times 100 = ₹80$

Profit = Selling Price $-$ Cost Price

$= 100 - 80 = ₹20$

Profit percentage

$= \frac{20}{80} \times 100$

$= 25%$

✅ Correct Answer: 25%