A person buys some bananas at ₹Y per dozen and sells them at ₹$\frac{Y}{4}$ per banana. What is his gain percentage?

200% 50% 80% 100%

200%

Cost price of bananas = y per dozen  Selling price of bananas = ₹$\frac{Y}{4}$ × 12 = 3y per dozen  Profit  = 3y - y  = 2y Profit % =  \(\frac{2y}{y}\) × 100 = 200%