You can separate the parts of the expression to make it easier to solve.
8/-2= -4
2/5(/)1/5= 2/5 (you could just do 2/1= 2 and put 5 as the denominator)
-4 2/5
That is a mixed number, with an integer and a fraction. It cannot be simplified any more.
I hope this helps!
~kaikers