Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.5" was replaced by "(5/10)". 2 more similar replacement(s)

Step  1  :

            1
 Simplify   —
            2

Equation at the end of step  1  :

  105   1
  ——— • —
  100   2

Step  2  :

            21
 Simplify   ——
            20

Equation at the end of step  2  :

  21   1
  —— • —
  20   2

Step  3  :

Final result :

  21           
  —— = 0.52500 
  40