I've tried using every percentage and i just cant figure it out. Is there a certain set amount taken out of your taxes? Or does it just differ on how much money you make each week? Someone please help me out! Thanks!

http://www.michigan.gov/documents/taxes/446-T_255395_7.pdf

Let me say I am not familiar with Michigan, but here are the withholding tables. It looks like if you claim no exemptions you would withhold 4.35%.

Hopefully, someone that knows more about Michigan taxes will come along.