If $₹ 2800$ is $\frac{2}{7}$ percent of the value of a house,the worth of the house (in $₹$) is

If $X = 600$ and $Y = 800$,then $X$ is how much percent less than $Y$?

Samar spends $52 \%$ of his monthly salary on household expenditure and $23 \%$ on miscellaneous expenditure. If he is left with $Rs. 4500$,what is his monthly salary?

Asha's monthly income is $60 \%$ of Deepak's monthly income and $120 \%$ of Maya's monthly income. What is Maya's monthly income,if Deepak's monthly income is Rs. $78000$?

$A$ shopkeeper marks the prices of his goods at $25 \%$ higher than the original price. After that,he allows a discount of $12 \%$. What profit or loss did he make?

In a class,$70 \%$ of the students read Hindi,$40 \%$ of the students are boys,and $20 \%$ of the girls do not read Hindi. What percentage of boys read Hindi?