Solution - Simplification or other simple results

Step  1  :

             7
 Simplify   ——
            40

Equation at the end of step  1  :

   7
  —— ÷ 28 ÷ 45
  40

Step  2  :

          7      
 Divide  ——  by  28
         40      

Equation at the end of step  2  :

   1 
  ——— ÷ 45
  160

Step  3  :

          1       
 Divide  ———  by  45
         160      

Final result :

    1            
  ———— = 0.00014 
  7200