In $2009$,the food production was $5.5$ million tonnes and in $2010$,the production was $4.4$ million tonnes. Find out the percentage decrease in food production in these two years?

In a certain school,$20 \%$ of students are below $8$ years of age. The number of students above $8$ years of age is $\frac{2}{3}$ of the number of students of $8$ years age,which is $48$. What is the total number of students in the school?

An empty fuel tank of a car was filled with $A$ type petrol. When the tank was half-empty,it was filled with $B$ type petrol. Again when the tank was half-empty,it was filled with $A$ type petrol. When the tank was half-empty again,it was filled with $B$-type petrol. What is the percentage of $A$ type petrol at present in the tank?

In Convent Model School,$60 \%$ of the students are boys. In an aptitude test,$80 \%$ of the girls scored more than $40$ marks (out of a maximum possible $150$ marks). If $60 \%$ of the total students scored more than $40$ marks in the same test,find the fraction of the boys who scored $40$ marks or less?

In a fraction,the numerator is increased by $25 \%$ and the denominator is diminished by $10 \%$. The new fraction obtained is $\frac{5}{9}$. The original fraction is:

Out of $450$ students of a school,$325$ play football,$175$ play cricket and $50$ neither play football nor cricket. How many students play both football and cricket?