If the selling price of 20 pens is equal to the cost price of 16 pens, then find the loss percentage.

If the cost price of an item is Rs. 3,200 and sale price is Rs. 2600, then the percentage loss will be :

An article is sold at a certain price. If it at 2/3 of that price, one loses 10%. Find the gain percentage at original price.

Radha sells her scooty for Rs. 50000 at a loss of 20%. At what price she should sell her scooty to make a profit of 10% ?

A shopkeeper buys $500$ m of electronic wire at $50$ paise per m. He sold $50$ % of the wire at a profit of $5$ %. At what percent should the shopkeeper sell the remaining wire so as to gain $10$% on the whole transaction?

If the cost price of 12 pens is equal to the selling price of 8 pens, then what is the gain percent?

A man bought 400 m of fabric @ Rs. 60 per metre. He sold 50% of it at a profit of 4%. At what percent should he sell the remaining to gain 12% on the whole transaction?