Solution - Simplification or other simple results

Step  1  :

            11
 Simplify   ——
            20

Equation at the end of step  1  :

   8    6    11
  (— • ——) • ——
   9   11    20

Step  2  :

             6
 Simplify   ——
            11

Equation at the end of step  2  :

   8    6    11
  (— • ——) • ——
   9   11    20

Step  3  :

            8
 Simplify   —
            9

Equation at the end of step  3  :

   8    6    11
  (— • ——) • ——
   9   11    20

Step  4  :

Final result :

   4           
  —— = 0.26667 
  15