A shopkeeper makes a profit of 10% on selling an article. What will be the percentage change in the profit percent if he had buy it for 20% less and sold it for 10% more? एक दुकानदार को किसी वस्तु को बेचने पर 10% का लाभ होता हैं | लाभ प्रतिशत में कितने प्रतिशत का बदलाव आयगा यदि वह वास्तु को 20% कम पर खरीद कर 10% अधिक पर बेच दे ?

Let CP = 100, SP = 110 (10% profit). New scenario: CP = 80 (20% less), SP = 121 (10% more on 110). New profit = 121 - 80 = 41. New profit percent = 41/80 × 100 = 51.25%. Original profit = 10%. Percentage change = ((51.25 - 10)/10) × 100 = 412.5%. This asks for change IN the profit percent, not the change in profit amount. Option A is the new profit percent, not the change. Option B and D are distractors.