Arun marks up the computer he is selling by $20 \%$ profit and sells them at a discount of $15 \%$. Arun's net gain percent is

Ramesh purchased a bicycle for $Rs.\,5200$ and spent $Rs.\,800$ on its repairs. He had to sell it for $Rs.\,5500.$ Find out his profit or loss percent.

The list price of an article at a showroom is $Rs.\, 2000$ and it is being sold at successive discounts of $20 \%$ and $10 \% .$ Its net selling price will be (in $Rs.$)

If the cost price of $12$ pens is equal to selling price of $8$ pens, find the gain percent.

$APD$ printed $3000$ copies of 'Career Power' at a cost of $Rs.$ $240000 .$ It gave $500$ copies free to different philanthropic institutions. It allowed a discount of $25 \%$ on the published price and gave one copy free for every $25$ copies bought at a time. It was able to sell all the copies in this manner. If the published price is $Rs.$ $325,$ then what is its overall gain or loss percentage in the whole transaction?

Meenal purchased a car for $Rs.\, 2,50,000$ and sold it for $Rs.\, 3,48,000 .$ What is the per cent profit she made on the car?