Sarthak bought a calculator for Rs. 400 and sold it for Rs. 480. Find his gain and gain% Share with your friends Share 0 Ankita Agarwal answered this Dear Student, Cost price of Calculator = Rs 400Selling price = Rs 480Profit = Rs480-400 = Rs 80Profit %age = 80400×100 = 20%Hence, sarthak gain 20% on selling a calculator. Regards 0 View Full Answer