B got 20% marks less than A. What per cent marks did A got more than B? 

18 percent of the coal was destroyed in a coal mine. If only 492 tons of coal was received, then tell how much coal was destroyed?

Two students appeared at an examination. One of them secured 9 marks more than the other and his marks were 56 % of the sum of their marks. The marks obtained by them are: 

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

Some students (only boys and girls) from different schools1 appeared for an Olympiad exam. 20% of the boys and 15% of the girls failed the exam. The number of boys who passed the exam was 70 more than that of the girls who passed the exam'. A total of 90 students failed. Find the number of students that appeared for the exam.

If the population of a town is 64000 and its annual increase is 10%, then its population at the end of 3 yeas will be :

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 price of an article is cut by 33 %, to restore its original value, the new price must be increased by