The population of a town increased from $1,75,000$ to $2,62,500$ in a decade. The average per cent increase of population per year is

The population of Delhi increases by $10 \%$ every year. If the current population of Delhi is $1,331,000$,what was its population $3$ years ago?

$A$ scored $30\%$ marks and failed by $15$ marks. $B$ scored $40\%$ marks and obtained $35$ marks more than that required to pass. The pass percentage is: (in $\%$)

$45 \%$ of $750 - 25 \%$ of $480 = ?$

$A$ person who spends $66 \frac{2}{3} \%$ of his income is able to save $₹ 1200$ per month. His monthly expenses (in $₹$) are

$65 \%$ of $? = 20 \%$ of $422.50$