How are salaries pro-rated in India?

In India, salaries are prorated based on the days worked in a given month. To calculate the prorated salary amount:

Monthly gross salary (Annual gross salary/12)* (Number of calendar days worked in a month/Total number of calendar days in the month).

For example, an employee with an annual gross salary of INR 200,000, works for 25 days in October, their prorated salary will be: 

[200,000/12] * [25/31] = INR 13,441.13