Mr. Shamin's salary increases every year by $10 \%$ in June. If there is no other increase or reduction in the salary and his salary in June $2011$ was $Rs$ $22,385$,what was his salary in June $2009$?

If $25 \%$ of a number is $6$,what is the number that is $50 \%$ more than the initial number?

$5 \%$ of $(25 \%$ of $₹ 1600)$ is

The population of a town is decreased by $20 \%$ and $25 \%$ in two successive years. What per cent population is decreased after two years?

$A$ number is increased by $20 \%$ and then decreased by $20 \%$. What is the final percentage change in the number?

Number of appeared candidates from State $Q$ increased by $100 \%$ from $2006$ to $2007$. If the total number of qualified candidates from State $Q$ in $2006$ and $2007$ together is $408$,what is the number of appeared candidates from State $Q$ in $2006$?