I think it's -15/32, because that's the only one that makes sense to me.
-5/16 cannot be the answer, because -3/8 is one slot to the left of it.
-5/8 cannot be the answer, because if you convert it to 16ths, its -10/16.
-23/64 cannot be the answer, because it could also be one slot to the RIGHT of -3/8.
