When computing the amount, people should remember not to count voluntary deductions. We go through this at work all the time.
"Something's wrong, I'm only getting about 60% of my salary in take-home pay!"
Let's see your paycheck, OK?
"See, that's only 60% of the gross. I have a friend who works for XYZ and we make about the same amount, but he gets a lot more take-home pay! Something's wrong."
What about this deduction for the 401k plan?
"What about it?"
What about these deductions for the group legal services plan, child care account, dental plan, and life insurance? These are all voluntary deductions.
"What's your point?"
My point is that you are really getting about 75% of your gross pay. But you chose to have additional deductions made. So you have to include those if you want to determine what percentage of your gross your take-home pay is.
"Why?"