Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.45" was replaced by "(45/100)".

Step  1  :

             9
 Simplify   ——
            20

Equation at the end of step  1  :

   9
  —— • 100
  20

Step  2  :

Final result :

  45