Solution - Simplification or other simple results

Step  1  :

            5
 Simplify   —
            7

Equation at the end of step  1  :

  2   5
  — • —
  3   7

Step  2  :

            2
 Simplify   —
            3

Equation at the end of step  2  :

  2   5
  — • —
  3   7

Step  3  :

Final result :

  10           
  —— = 0.47619 
  21