$A$ person's salary has increased from $Rs. 7200$ to $Rs. 8100$. What is the percentage increase in his salary (in $\%$)?

Fresh fruits contain $68 \%$ water and dry fruits contain $20 \%$ water. How much dry fruit can be obtained from $100 \,kg$ of fresh fruits?

In a class of $60$ students, $40\%$ can speak only Hindi, $25\%$ can speak only English and the rest of the students can speak both the languages. How many students can speak English?

In a marriage party,$32 \%$ are women,$54 \%$ are men,and there are $196$ children. How many men are there in the marriage party?

Mukesh has twice as much money as Soham. Soham has $50 \%$ more money than Pankaj. If the average money with them is ₹ $110$,then Mukesh has:

$x \%$ of $y + ? \%$ of $x = x \%$ of $(x + y)$