As far as I can tell, either the problem is wrong or the system is looking for it in a specific format. You have the right answer, perhaps whatever program you're using needs it put in as an improper fraction such as -5/3 ?
o0k, thank you. i tried putting it in both ways, so the question must be wrong or somethingg.
i hate when that happens. i sit here trying to figure it out for so long, FOR NOTHING!
but again, thanks for helping me.