Ajay spends 25% of his salary on house rent, 5% on food grains, 15% on travel and 10% on clothes and saves 27000, what is Ajay's monthly income?

The difference between the value of the number increased by 20 % and the value of the number decreased by 25 % is 36. Find the number. 

15 litres of a mixture contains alcohol and water in the ratio 1 : 4 , If 3 litres of Water is mixed in it , the percentage of alochol in the new mixture will be : 

A number, on subtracting 15 from it reduces to its 80 %. What is 40 % of the number? 

There are 80 students in a class out of these 15% are girls. The monthly fee of each girl is Rs.350 and monthly fee of each boy is 38% more than each girl. What is the total fee of girls and boys in the class?

The difference of two numbers is 20 % of the larger number. If the smaller number is 20, the larger number is:

 A student scored 32 % marks in science subjects out of 300. How much should he score in language papers out of 200 if he is to get overall 46 % marks? 

What percentage of the whole week does Ajay spend in office, if his office hours are 9 am to 5 pm from Monday to Friday?