Solution - Simplification or other simple results

Step  1  :

            15
 Simplify   ——
            1 

Equation at the end of step  1  :

  15
  —— ÷ 1
  3 

Step  2  :

            5
 Simplify   —
            1

Equation at the end of step  2  :

  5
  —
  1

Step  3  :

            5
 Simplify   —
            1

Final result :

  5