What per cent of $\frac{2}{7}$ is $\frac{1}{35} ?$

Due to an increase of $30 \%$ in the price of eggs,$3$ eggs less are available for $₹ 7.80$. The present rate of eggs per dozen is:

The radius of a sphere is increased by $10 \%$. The surface area increases by

$A$ bag contains $600$ coins of $25$ paise and $1200$ coins of $50$ paise. If $12 \%$ of $25$ paise coins and $24 \%$ of $50$ paise coins are removed,the percentage of money removed from the bag is nearly: (in $\%$)

$45 \%$ of $1500 + 35 \%$ of $1700 = ? \%$ of $3175$

If $25 \%$ of a number is subtracted from a second number,the second number reduces to its five-sixths. What is the ratio of the first number to the second number?