Solution - Simplification or other simple results

Step  1  :

             5
 Simplify   ——
            11

Equation at the end of step  1  :

        10    5
  0 -  (—— • ——)
        13   11

Step  2  :

            10
 Simplify   ——
            13

Equation at the end of step  2  :

        10    5
  0 -  (—— • ——)
        13   11

Step  3  :

Final result :

  -50            
  ——— = -0.34965 
  143