A dealer marks his goods 20% above the cost price and then allows a discount of 10%. What is his gain percentage?

माना CP = ₹100। अंकित मूल्य (MP) = ₹120। छूट = 120 का 10% = ₹12। विक्रय मूल्य (SP) = 120 - 12 = ₹108। लाभ = 8%।