Nanda's marks in $3$ Math tests$\mathrm{T}1, \mathrm{T}2$ and $\mathrm{T}3$ were $38$ out of $40, 27$ out of $30$ and $48$out of $50$. In which test did he do well? Find his overall percentage in all the $3$ tests.

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?

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

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?

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?