Out of total students in class ${\mathrm{X}}^{\mathrm{th}}$$66\frac{2}{3}\%$ are in section $\mathrm{A}$ and remaining are in section $\mathrm{B}.$ If $50$ students from section $\mathrm{A}$ are shifted to section $\mathrm{B},$ then total students in hostel A becomes $50\%$ of total students. If $40$ students from section $\mathrm{B}$ are shifted to section $\mathrm{A},$ then the total students in section $\mathrm{B}$ becomes what per cent of total students in class ${\mathrm{X}}^{\mathrm{th}}$?

There are $1500$ students in a school, $15\%$ are Muslims, $7\%$ are Sikhs, $8\%$ are Christians and remaining are Hindus. How many Hindu students are there in the school?

Current salary of Kriti is 4800. There will be increase of 15% in it in next year, what  will be the increased salary of Kriti after increment?

If $15\% of (x + y) = 45\% of (x - y)$, then $y$ is how much percent of $x$?

A small scale soap business has the following expenses: 10% on marketing, 65% on employees salary and 25% on raw materials. If the business pays a total salary of Rs. 65,000 then what is its marketing expense?