If the cost price of 9 articles is equal to the selling price of 12 articles, then the gain or loss percent isA25% gainB25% lossC20% lossD20% gainAnswer: B. 25% loss Read Explanation: Cost price of 9 articles = Selling price of 12 articles Loss percentage = [(12 - 9)/12] × 100% ⇒ (1/4) × 100% ⇒ 25%Read more in App