Shivam buys a pencil for ₹ 15 and an eraser for ₹ 5. He then sells them for a total of ₹30. What is his profit percent?
Ram buys 40 pencils for ₹ 80 and sells 30 of them for ₹ 90. Find his profit or loss percent.
A retailer buys a radio for Rs. 225. His overhead expenses are Rs. 15. If he sells the radio for Rs. 300, determine his profit percent.