Two numbers are respectively $60 \%$ and $20 \%$ more than a third number. The second number expressed as a percentage of the first is:

$25 \%$ of $25 \% = ?$

$0.15 \%$ of $33 \frac{1}{3} \%$ of $Rs. 10,000$ is?

Amit donated $20\%$ of his income to a school and deposited $20\%$ of the remainder in his bank. If he has $₹ 12800$ now,what is the income (in $₹$) of Amit?

How many students passed in first class?
Statements:
$I$. $85 \%$ of the students who appeared in the examination have passed either in first class,second class,or pass class.
$II$. $750$ students have passed in second class.
$III$. The number of students who passed in pass class is $28 \%$ of those who passed in second class.

If the price of a book is first decreased by $25 \%$ and then increased by $20 \%,$ then the net change in the price will be