Solution - Simplification or other simple results

Step  1  :

            13
 Simplify   ——
            15

Equation at the end of step  1  :

  30   13
  —— • ——
  52   15

Step  2  :

            15
 Simplify   ——
            26

Equation at the end of step  2  :

  15   13
  —— • ——
  26   15

Step  3  :

Final result :

  1           
  — = 0.50000 
  2