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

$A$ businessman imported laptops worth $Rs$ $210,000$,mobile phones worth $Rs$ $100,000$,and television sets worth $Rs$ $150,000$. He had to pay $10\%$ duty on laptops,$8\%$ on phones,and $5\%$ on television sets. How much total duty (in Rupees) did he have to pay on all items as per the above details?

If $37 \frac{1}{2} \%$ of a number is $45,$ then $87 \frac{1}{2} \%$ of the number will be:

$45 \%$ of $1500 + 35 \%$ of $1700 = ? \%$ of $3175$

When $40$ is subtracted from $30 \%$ of a number,the result is $50$. What is the value of the number?

$6 \frac{1}{4} \%$ of $1600 + 12 \frac{1}{2} \%$ of $800$ equals