Twelve percent of Kaushal's monthly salary is equal to sixteen percent of Nandini's monthly salary. Suresh's monthly salary is half that of Nandini's monthly salary. If Suresh's annual salary is $Rs$ $1.08$ Lakhs,what is Kaushal's monthly salary?

In an examination,$35 \%$ of the students passed and $455$ failed. How many students appeared for the examination?

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?

An index of $12$ shares contains,among others,the shares of Vision Power,Vision Infra,and Vision Communication with weightage of $7\%$,$13\%$,and $15\%$ respectively. What is the increase in the prices of other shares,if these three rise by $9\%$,$10\%$,and $4\%$ respectively,while the index rises by $6\%$?

An article is sold at a discount of $20 \%$ on the marked price. In order to gain $60 \%$ on the marked price,at how much more percent of the discounted price should it be sold?

Two-thirds of three-fourths of one-fifth of a number is $15$. What is $30$ per cent of that number?