The number that is to be added to $10 \%$ of $320$ to have the sum as $30 \%$ of $230$ is

Sixty-five percent of a number is $21$ less than four-fifth of that number. What is the number?

The daily wage is increased by $25 \%$ and a person now gets $₹ 25$ per day. What was his daily wage before the increase?

Rajiv spends $20 \%$ of his salary on food,$15 \%$ on conveyance,$10 \%$ on education,and $35 \%$ on house rent. If he spends $Rs. 1950$ on education,how much does he spend on conveyance?

$A$'s salary is $50 \%$ more than $B$'s. How much percent is $B$'s salary less than $A$'s?

Nutan got $456$ marks in an exam. Aditya got $54 \%$ marks in the same exam,which is $24$ less than Nutan. The minimum passing marks in the exam is $35 \%$. How many marks did Nutan get more than the passing marks?