Express $8 \frac{1}{3} \%$ as a fraction.

Aditya's salary was increased by $40 \%$ and then decreased by $25 \%$. Find the net effect on Aditya's salary.

When the price of an article is reduced by $15 \%$,the sales increase by $35 \%$. The percentage change in the total amount of receipts is:

$60 \%$ of $264$ is the same as

The number which exceeds $16 \%$ of it by $42$ is:

$x \%$ of $y + ? \%$ of $x = x \%$ of $(x + y)$