In an examination, 45% of all the students who appeared are boys and the rest are girls. If 60% of the boys and 70% of the girls passed, then what is the percentage of students who failed?

When the tax on an article is increased by 20%, its consumption is decreased by 20%. In total tax receipt on this item-

A number is first decreased by 10% and then increased by 10%. The number so obtained is 50 less than the original number. The original number is:

if 20% of A = 50% of B, then what percentage of A is B?

The Government reduced the price of sugar by 10 per cent. By this a consumer can buy 6.2 kg more sugar for ₹ 837. The reduced price per kg of sugar is:

Under a discount scheme, a dozen pair of gloves quoted at ₹200 is available at a discount of 20%. How many pairs of gloves can be bought for ₹320?

The price of petrol is increased by 25%. By how much percent a car owner should reduce his consumption of petrol so that the expenditure on petrol would not be increased?

The length of a rectangle is in- creased by 10% and breadth de- creased by 10%. Then the area of the new rectangle is: