If the price of petrol be raised by 20%, then the percentage by which a car owner must Reduce his consumption so as not to increase his expenditure on petrol is 

A reduction of 20 % in the price of salt enabled a purchaser to obtain 4 kg. more for Rs. 100. The reduced price of salt per kg is :

A cloth merchant sold half of his cloth at a 40% profit. half of remaining at 40% loss and the rest was sold at the cost price. In the total transaction, his gain or loss will be

In an exhibition entrance charge was Rs.5 and now it is reduced by 20%. Therefore total income on selling the tickets is increased by 44%, then what is the percent increase in tickets sold?

Mohan gets 3 marks for each correct sum and loses 2 marks for each wrong sum. He attempts 30 sums and obtains 40 marks. The number of sums solved correctly is:

Prashant's monthly income is 30% more than that of Vimal. Vimal's monthly income is 20% less than that of Abhishek. If half of the value of the difference between the monthly income of Prashant and Abhishek is Rs.1800, what is the monthly income of Vimal? 

A house worth Rs.1,50,000 is sold by X at a 5% profit to Y, Y sells the house back to X at a 2% loss. Then find profit and loss in the entire transaction.