Solution - Simplification or other simple results

Step  1  :

            4
 Simplify   —
            5

Equation at the end of step  1  :

  4
  — ÷ 9 ÷ 20
  5

Step  2  :

         4      
 Divide  —  by  9
         5      

Equation at the end of step  2  :

   4
  —— ÷ 20
  45

Step  3  :

          4      
 Divide  ——  by  20
         45      

Final result :

   1            
  ——— = 0.00444 
  225