cash on cash return on investment

[Steve Haake]

Novice real estate investor here.  Can someone help me understand coc roi.  I understand it's cash on cash return on investment.  When I'm analyzing deals, it's coming up as 0.02% or even negative percent if i'm overly conservative with the expenses.  From what I read a good coc roi is 7-10%.  I don't know if I'm interpreting the coc roi correctly.  Thanks for your help.