Solution - Simplification or other simple results

Step  1  :

             4
 Simplify   ——
            25

Equation at the end of step  1  :

  35    4
  —— • ——
  16   25

Step  2  :

            35
 Simplify   ——
            16

Equation at the end of step  2  :

  35    4
  —— • ——
  16   25

Step  3  :

Final result :

   7           
  —— = 0.35000 
  20