Profit and Loss

Find the gain or loss per cent when:

C P = Rs 345 and S P = Rs 372.60

A student buys a pen for Rs 90 and sells it for Rs 100. Find his gain percent.

Find the cost price when:

SP = Rs 657.60 and loss% = 4%

The cost price of 10 articles is equal to the selling price of 9 articles. Find the profit percentage.

Coffee costing Rs 250 per kg was mixed with chicory costing Rs 75 per kg in the ratio 5 : 2 for a certain blend. If the mixture was sold at Rs 230 per kg, find the gain or loss per cent.

A dealer buys a wrist watch for Rs. 225 and spends Rs.15 on its repairs. If he sells the same for Rs.300, find his profit percentage.

If the selling price of 10 pens is equal to cost price of 14 pens, find the gain percent?

If the selling price of a flower vase is 5/6 of its cost price, find the loss per cent.

A radio is sold for Rs 3120 at a loss of 4%. What will be the gain or loss per cent if it is sold for Rs 3445?

A dishonest shopkeeper professes to sell pulses at his cost price but uses a false weight of 950 gm for each kilogram. Find his gain percentage.