If $35 \%$ of a number is $175,$ then what percent of $175$ is that number (in $\%$)?

In a certain quantity of ghee, $60 \%$ is pure ghee and $40 \%$ is vanaspati. If $10 \text{ kg}$ of pure ghee is added, the concentration of vanaspati ghee becomes $20 \%$. What was the original quantity (in $\text{ kg}$)?

$3.5$ can be expressed in terms of percentage as:

In a company,there are $75\%$ skilled workers and the remaining are unskilled. $80\%$ of skilled workers and $20\%$ of unskilled workers are permanent. If the number of temporary workers is $126$,what is the total number of workers?

What percentage of numbers from $1$ to $70$ have squares that end in the digit $1$?

The quantity of water needed to reduce $9 \ ml$ of shaving lotion containing $50 \%$ alcohol to a lotion containing $30 \%$ alcohol is: (in $ml$)