What is $15$ percent of $ 34$?

In an examination,$70 \%$ of the candidates passed in English,$80 \%$ passed in Mathematics,and $10 \%$ failed in both subjects. If $144$ candidates passed in both,the total number of candidates was:

If the numerator of a fraction is increased by $150 \%$ and the denominator of the fraction is increased by $300 \%$,the resultant fraction is $\frac{5}{18}$. What is the original fraction?

The present population of a town is $26010$. It increases annually at the rate of $2\%$. What was the population of the town two years ago?

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

The population of a town increases by $5 \%$ annually. If its population in $2001$ was $138915$,what was it in $1998$?