Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.05" was replaced by "(05/100)".

Step  1  :

             1
 Simplify   ——
            20

Equation at the end of step  1  :

  01
  ——
  20

Step  2  :

                  1
 Divide  20  by  ——
                 20

Final result :

  400