Solution - Simplification or other simple results

Step  1  :

            5
 Simplify   —
            3

Equation at the end of step  1  :

  12   5
  —— • —
  20   3

Step  2  :

            3
 Simplify   —
            5

Equation at the end of step  2  :

  3   5
  — • —
  5   3

Step  3  :

Final result :

  1