If $8 \%$ of $x = 4 \%$ of $y,$ then $20 \%$ of $x$ is:

In a class of $60$ students, $40\%$ can speak only Hindi, $25\%$ can speak only English and the rest of the students can speak both the languages. How many students can speak English?

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?

The tax on a commodity is diminished by $10 \%$ and its consumption increases by $10 \%$. Find the effect on revenue.

Mrs. Jain invests $14 \%$ of her monthly salary,i.e.,$Rs. 7014$ in Insurance Policies. Later she invests $21 \%$ of her monthly salary on Family Mediclaim Policies; also she invests another $6.5 \%$ of her salary on Mutual Funds. What is the total annual amount invested by Mrs. Jain?

$0.005 = (-?-)*$