step 1
Find the common denominator.
5/8 and 1/6---------> would be 2³*3----> 24
step 2
multiply (5/8) by (3/3) and (1/6) by (4/4)
5/8-----> 15/24
1/6-----> 4/24
step 3
find the numbers
4/24+15/24------> 19/24
4/24-15/24-------> -11/24
the answer is
the two numbers are
19/24 and -11/24
see the attached figure