Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.8" was replaced by "(8/10)". 2 more similar replacement(s)

Step  1  :

            4
 Simplify   —
            5

Equation at the end of step  1  :

   9   4
  —— • —
  10   5

Step  2  :

             9
 Simplify   ——
            10

Equation at the end of step  2  :

   9   4
  —— • —
  10   5

Step  3  :

Final result :

  18           
  —— = 0.72000 
  25