What is the percent increase in the profit of shopkeeper S in the month of December - 2009 over the previous month ? (rounded off to two digits after decimal)

What is the respective ratio between the profit earned by shopkeeper U in the months February-2010 and March - 2010 together to that earned by shopkeeper Q in the same months ?

What is the respective ratio of the number of girls enrolled in only Painting classes to the number of boys enrolled in the same ?

Number of girls enrolled in only Dancing classes is what percent of the boys enrolled in the same? (rounded off to two digits after decimal)

What is the total number of students enrolled in all the three classes together ?

Total number of girls enrolled in Singing is 'approximately' what percent of the total number of students in the school ?