Solution - Simplification or other simple results

Step  1  :

             9
 Simplify   ——
            28

Equation at the end of step  1  :

   10   15     9
  (—— • ——) • ——
   30   29    28

Step  2  :

            15
 Simplify   ——
            29

Equation at the end of step  2  :

   10   15     9
  (—— • ——) • ——
   30   29    28

Step  3  :

            1
 Simplify   —
            3

Equation at the end of step  3  :

   1   15     9
  (— • ——) • ——
   3   29    28

Step  4  :

Final result :

   45           
  ——— = 0.05542 
  812