Solution - Simplification or other simple results

Step  1  :

            p
 Simplify   —
            e

Equation at the end of step  1  :

  p
  — ÷ a ÷ r
  e

Step  2  :

         p      
 Divide  —  by  a
         e      

Equation at the end of step  2  :

   p
  —— ÷ r
  ea

Step  3  :

          p      
 Divide  ——  by  r
         ea      

Final result :

   p 
  ———
  ear