If one number is $80 \%$ of the other and $4$ times the sum of their squares is $656,$ then the numbers are:

$A$ man loses $20 \%$ of his money. After spending $25 \%$ of the remainder,he has $Rs. 480$ left. What is the amount of money he originally had?

The monthly salary of Mr. Sachdev increases by $5 \%$,and as a result,his new annual salary becomes $₹ 15,120$. What was his earlier monthly salary (before the increase)?

In an election between two candidates,$10 \%$ of the voters did not cast their vote. $10 \%$ of the votes polled were found invalid. The successful candidate received $54 \%$ of the valid votes and won by a majority of $1620$ votes. The total number of voters enrolled on the voter's list was:

$39.897 \%$ of $4331 + 58.779 \%$ of $5003 = ?$

The product of one-third of a number and $150 \%$ of another number is what percent of the product of the given numbers?