Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "1.05" was replaced by "(105/100)".

Step  1  :

            21
 Simplify   ——
            20

Equation at the end of step  1  :

  21
 (——)5
  20

Step  2  :

 2.1     21 = 3•7

(21)⁵ = (3•7)⁵ = 3⁵ • 7⁵  2.2     20 = 2²•5 (20)⁵ = (2²•5)⁵ = 2¹⁰ • 5⁵

Final result :

   (35•75)           
  ———————— = 1.27628 
  (210•55)