If the selling price of a product is multiplied by 2, the resulting profit is 6 times the original profit. What is the original profit percentage?

Krishna bought a camera and paid 20 % less than its original price. He sold it at 40 % profit on the price he had paid. The percentage of profit earned by Krishna on the original price was 

If a vendor sells apples at Rs 170 per kg he suffers 15 % loss. If he sells at Rs 230 per kg, then what is his profit percentage? 

If the cost of production of an article is 2/5 of its marked retail price, If it is sold at 10 % discount then what will be profit ? 

A person bought pens at 25 for a rupee and sold at 15 for a rupee. What is his profit percentage? 

If a man purchase 11 articles for Rs.10 and sold all the articles at the rate of 10 for Rs.11, the profit percentage will be.

The profit percentage of P and Q is same on selling the articles at Rs. 1800 each but A calculates his profit on the selling price while Q calculates it correctly on the cost price which is equal to 20%. What is the difference in their profits?

The cost price of a radio is Rs. 600. The 5% of the cost price is charged towards transportation. After adding that, If net profit to be made is 15%, then the selling price of the radio must be