Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "^-2" was replaced by "^(-2)".

(2): "9.91" was replaced by "(991/100)".

Step  1  :

            991
 Simplify   ———
            100

Equation at the end of step  1  :

  991
 (———)-2
  100

Step  2  :

 2.1     100 = 2²•5² (100)^-2 = (2²•5²)^(-2) = (2)^(-4) • (5)^(-4)

Final result :

  1 • (24•54)
  ———————————
   1 • 9912