From the salary of an officer,$10 \%$ is deducted as house rent,$20 \%$ of the rest,he spends on conveyance,$20 \%$ of the rest he pays as income tax and $10 \%$ of the balance,he spends on clothes. If he is left with ₹ $15552$,find his total salary.

$0.15 \%$ of $33 \frac{1}{3} \%$ of $₹ 10000$ is

If $A$'s salary is $20\%$ higher than $B$'s,then how much percent is $B$'s salary less than $A$'s salary?

$0.06 \%$ of $250 \%$ of $1600$ is

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

Ram borrowed $Rs. 725$ from Shyam at the beginning of a year at a certain rate of interest. After $8$ months,he again borrowed $Rs. 362.50$ at a rate of interest double that of the former sum. At the end of the year,the total interest on both loans is $Rs. 43.50$. Find the first rate of interest per annum.