Two numbers are more than the third number by $20 \%$ and $80 \%$ respectively. The first number is what percent of the second number?

The monthly income of a person is $Rs. 5000$. If his income is increased by $30\%$,then what is his monthly income now?

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

Christy donated $10 \%$ of his income to an orphanage and deposited $20 \%$ of the remainder in his bank. If he has now $Rs$ $7200$ left,what is his income?

There is a ratio of $5:4$ between two numbers. If $40\%$ of the first number is $12$,then what would be $50\%$ of the second number?

The strength of a school increases and decreases in every alternate year by $10 \%$. It started with an increase in $2000$. Then the strength of the school in $2003$ as compared to that in $2000$ was