The price of milk is increased by 25%, by what percentage should a housewife reduce the use of milk in her house so that there is no increase in her monthly expenditure?

If x% of $${25\over 2}\%$$ is 150, then the value of x is : 

The price of diesel increases by 5% every year. If the current price of diesel is ₹80 per litre, then what will be the price of diesel per litre after 2 years?

If the length of a rectangle is increased by 20% and its breadth is decreased by 20%, its area:

A is 80% more than B and C is $$48{4\over 7}\%$$ less than the sum of A and B. By what percent is C less than A?

On subtracting 10 from a number, that number is decreased by 20%, then what is 60% of that number?

0.15% of $$33{1\over 3}\%$$ of ₹ 10000 is :

B is 10% more than A. C is 20% less than A. B is what percentage more than C?