If $60 \%$ of the students in a school are boys and the number of girls is $812$,how many boys are there in the school?

$A$ number increased by $22 \frac{1}{2} \%$ gives $98$. The number is

$A$ man spends $75 \%$ of his income. His income increases by $20 \%$ and his expenditure also increases by $10 \%$. The percentage of increase in his savings is (in $\%$)

Two numbers are less than a third number by $30 \%$ and $37 \%$ respectively. How much per cent is the second number less than the first (in $\%$)?

$0.01$ is what percent of $0.1$?

The price of an article is Rs. $100$. Its price is increased by $10 \%$,and then again its price is increased by $10 \%$. What is the total increase in the price?