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

An $HR$ Company employs $4800$ people,out of which $45 \%$ are males and $60 \%$ of the males are either $25$ years or older. How many males are employed in the company who are younger than $25$ years?

The population of a town was $160000$ three years ago. If it increased by $3 \%$,$2.5 \%$,and $5 \%$ respectively in the last three years,then the present population is:

If the price of gold increases by $30 \%$,find by how much the quantity of ornaments must be reduced so that the expenditure may remain the same as before?

$A$ man spends $75 \%$ of his income. His income is increased by $20 \%$ and he increases his expenditure by $10 \%$. By what percentage does his saving increase (in $\%$)?

$? \times 15 = 37.5 \%$ of $220$