$0.01$ is what percent of $0.1$?

$65 \%$ of $? = 20 \%$ of $422.50$

Water tax is increased by $20 \%$ but its consumption is decreased by $20 \%$. The increase or decrease in the expenditure is:

The present population of a town is $26010$. It increases annually at the rate of $2\%$. What was the population of the town two years ago?

If $35 \%$ of a number is $12$ less than $50 \%$ of that number,then the number is:

In two successive years,$80$ and $60$ students of a school appeared at the final examination,of which $60 \%$ and $80 \%$ passed respectively. The average rate of students passed (in percent) is