An article is sold at a profit of 20% of its cost price. If cost price and selling price reduces by Rs 10 and Rs. 5 respectively, then the percentage profit increased to 30%. Find the cost price?

Raghu sold an article for Rs. 180 after allowing a 20% discount on its marked price. Had he not allowed any discount, he would have gained 20%. What is the cost price of the article?

A vendor buys bananas at 12 for 45 and sells at 5 for 35. What will be the gain ? 

A trader purchased a gift box for Rs. 150. What should be the marked price on the gift box so that after allowing a discount of 10 %, he makes a profit of 10 %? 

A trader makes a profit equal to the selling price of 75 articles when he sold 100 of the articles . What % profit did he make in the transaction?

While selling an article for Rs 18450, a person suffered a loss of 50%. At what price he should have sold the article (in Rs) to earn a profit of 50%?

By selling an article for Rs. 450, I lose 20%. For what price should I sell it to gain 20% ? 

If an article is sold at 200 % profit then the ratio of its cost price to its selling price will be