Mohan bought a CD for Rs. 750 and sold it for Rs. 875. Find his gain percent?

3 Sahana sells two watches for Rs. 1955 each gaining 15% on one and losing 15% on the other. Find her gain or loss percent in the whole transaction.  4 By selling a T-shirt Rs. 216, a shopkeeper, loss 4%. What will be the actual price of a T-shirt?  6 Ravi purchased a table for Rs. 1260 and due to some scratches on its top, he had to sell it for Rs. 1197. Find his loss %. 7 Ravi purchased an old scooter for Rs. 12000 and spent Rs. 2850 on its overhanling. Then he sold it to his friend for Rs. 13860. How much percent did he gain or loss?