Solution - Reducing fractions to their lowest terms

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "r1"   was replaced by   "r^1". 

Step  1  :

             r
 Simplify   ——
            81

Equation at the end of step  1  :

   r        
  —— ÷ 4 -  28
  81        

Step  2  :

          r      
 Divide  ——  by  4
         81      

Equation at the end of step  2  :

   r     
  ——— -  28
  324    

Step  3  :

Rewriting the whole as an Equivalent Fraction :

 3.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  324  as the denominator :

          28     28 • 324
    28 =  ——  =  ————————
          1        324   

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 :

 3.2       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:

 r - (28 • 324)     r - 9072
 ——————————————  =  ————————
      324             324   

Final result :

  r - 9072
  ————————
    324