Solution - Simplification or other simple results

Step  1  :

            1
 Simplify   —
            5

Equation at the end of step  1  :

  1
  — ÷ 1 ÷ 4
  5

Step  2  :

         1      
 Divide  —  by  1
         5      

Equation at the end of step  2  :

  1
  — ÷ 4
  5

Step  3  :

         1      
 Divide  —  by  4
         5      

Final result :

   1           
  —— = 0.05000 
  20