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 $\%$)?

Two numbers are respectively $20 \%$ and $10 \%$ more than a third number. How much per cent is the first number more than the second?

The population of Delhi two years ago was $55000$. It increased by $12 \%$ in the first year and decreased by $15 \%$ in the second year. What was the population of the town at the end of $2$ years?

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?

An $HR$ Company employs $4800$ people,out of which $45 \%$ are males and $60 \%$ of the males are either $25$ years or older. How many males are employed in the company who are younger than $25$ years?

One type of liquid contains $20 \%$ water and the second type of liquid contains $35 \%$ water. $A$ glass is filled with $10$ parts of the first liquid and $4$ parts of the second liquid. What is the percentage of water in the new mixture in the glass?