Ramesh loses $20 \%$ of his pocket money. After spending $25 \%$ of the remainder,he has $₹ 480$ left. What was his pocket money?

Peter earned $40\%$ more money than Albert. Albert earned $20\%$ less than Michael. Peter earned more than Michael by: (in $\%$)

If $A$ is equal to $20 \%$ of $B$ and $B$ is equal to $25 \%$ of $C$,then what percent of $C$ is equal to $A$ (in $\%$)?

For admission in a postgraduate program of Calcutta University,$90 \%$ of the candidates who appeared for the written test were males and the rest were females. $60 \%$ of the males and $80 \%$ of the females passed the written test. What is the total number of students who appeared for the written test,if the total number of passed candidates was $1240$?

An ore contains $23 \%$ copper. To get $69 \text{ kg}$ of copper, the quantity of the ore required is: (in $\text{ kg}$)

$3.5$ can be expressed in terms of percentage as: