Solution - Reducing fractions to their lowest terms

Step  1  :

            21
 Simplify   ——
            4 

Equation at the end of step  1  :

  21    
  —— -  2
  4     

Step  2  :

Rewriting the whole as an Equivalent Fraction :

 2.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  4  as the denominator :

         2     2 • 4
    2 =  —  =  —————
         1       4  

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:

 21 - (2 • 4)     13
 ————————————  =  ——
      4           4 

Final result :

  13           
  —— = 3.25000 
  4