$A$'s salary is $20 \%$ less than $B$'s salary. Then $B$'s salary is more than $A$'s salary by:

Evaluate $28 \%$ of $450 + 45 \%$ of $280$.

In a class,$60 \%$ of the students pass in Hindi and $45 \%$ pass in Sanskrit. If $25 \%$ of them pass in both subjects,what percentage of the students fail in both subjects?

What percentage is equivalent to $5 \frac{1}{4}$?

Two numbers are less than a third number by $30 \%$ and $37 \%$,respectively. How much per cent is the second number less than the first?

$60 \%$ of $264$ is the same as