Solution - Reducing fractions to their lowest terms

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "20.91" was replaced by "(2091/100)".

Step  1  :

            2091
 Simplify   ————
            100 

Equation at the end of step  1  :

        2091
  39 -  ————
        100 

Step  2  :

Rewriting the whole as an Equivalent Fraction :

 2.1   Subtracting a fraction from a whole

Rewrite the whole as a fraction using  100  as the denominator :

           39     39 • 100
     39 =  ——  =  ————————
           1        100   

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

 2.2       Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

 39 • 100 - (2091)     1809
 —————————————————  =  ————
        100            100 

Final result :

  1809            
  ———— = 18.09000 
  100