Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "^-4" was replaced by "^(-4)".

(2): ".42" was replaced by "(42/100)".

Step  1  :

            21
 Simplify   ——
            50

Equation at the end of step  1  :

           21
  (10-4) • ——
           50

Step  2  :

 2.1     10 = 2•5

(10)^-4 = (2•5)^(-4) = (2)^(-4) • (5)^(-4)

Equation at the end of step  2  :

                      21
  ((2)(-4)•(5)(-4)) • ——
                      50

Step  3  :

Multiplying exponents :

 3.1    2⁴  multiplied by  2¹   = 2^{(4 + 1)} = 2⁵

Multiplying exponents :

 3.2    5⁴  multiplied by  5²   = 5^{(4 + 2)} = 5⁶

Final result :

     21             
  ——————— = 0.00004 
  (25•56)