Solution - Simplification or other simple results

Step  1  :

            15
 Simplify   ——
            32

Equation at the end of step  1  :

         8         15
  0 -  (—— • (0 -  ——))
        25         32

Step  2  :

             8
 Simplify   ——
            25

Equation at the end of step  2  :

         8   -15
  0 -  (—— • ———)
        25   32 

Step  3  :

Final result :

   3           
  —— = 0.15000 
  20