Dear Lakshmi,
I saw your question.I gave answer below.Please if you have any doubt ask with me.

ForMula is

((no. Of attritions x 100) / (Actual Employees + New Joined)) /100.


Examples:

1) Actual Employees No. Of people left No. Of Joined Total Employees
(Opening BAL) (Attritions) (Current Head No)
150 20 25 155


So according to the formula: ((20 x 100) / (150 + 25)) / 100

Which comes to 0.1142 i.e. 11%

Now as you had 150 previously and now 25 joined so it makes 150 + 25 =175

Now if you calculate 11.42% of 175 i.e. 175 x 0.1142 = 20

Which clearly shows that 175 – 20 = 155, which is your current headcount and at the same time you can say my attrition is 11.42% that shows you lost 20 employees of 150 and 25 more joined which makes count to 175.

Dear Mr.venkatesha

Thanks for the reply, it helps me a lot.