CAT 2017 Profit & Loss — Previous Year Question

Gopal is planning to sell two radios. The first radio is marked ₹200 over and above the cost price and is sold at a discount of 20% on it. The other radio is marked 50% over and above the cost price and sold at discount of ₹160. If his profit is 15% on both radios combined and 5% on the first alone, what is the percentage of profit on the second radio?