Which one of the following shows the best percentage?

Two litres of water evaporate from $10$ litres of a solution containing $10 \%$ salt. The percentage of salt in the remaining solution is

What fraction is $0.6 \%$?

Two tailors $X$ and $Y$ are paid a total of ₹ $550$ per week by their employer. If $X$ is paid $120$ percent of the sum paid to $Y$,how much is $Y$ paid per week?

When a number is divided by $12$,the quotient becomes $1/4$ of another number. By what percentage is the first number greater than the second number?

Two numbers are $10\%$ and $25\%$ lesser than a third number. By what percentage must the second number be increased to make it equal to the first number (in $\%$)?