Answer :

You could do -1/-2 times -5/-4 which would be 5/8
TSO
[tex] -\frac{5}{4} \times- \frac{1}{2} = +\frac{5}{8} [/tex]

So the two not positive fractions are [tex]- \frac{5}{4}[/tex] and [tex]- \frac{1}{2} [/tex]