The price of electricity has been increased by $25 \%$. If a person wants to keep the expenditure same,then the percentage reduction in use of electricity should be: (in $\%$)

An agent gets a commission of $2.5 \%$ on the sales of cloth. If on a certain day,he gets Rs. $12.50$ as commission,the cloth sold through him on that day is worth?

$32.05 \% \text{ of } 259.99 = ?$

Two jars contain equal quantities of $40 \%$ alcohol. Swati changed the concentration of the first jar to $50 \%$ by adding extra quantity of pure alcohol. Sonali changed the concentration of the second jar to $50 \%$ by replacing a certain quantity of the solution with pure alcohol. By what percentage is the quantity of alcohol added by Swati more than that replaced by Sonali?

$860 \%$ of $50 + 50 \%$ of $860 = ?$

The population of a town was $48600$. It increased by $25\%$ in the first year and decreased by $8\%$ in the second year. What will be the population of the town at the end of $2$ years?