Solution - Reducing fractions to their lowest terms

Step  1  :

            3
 Simplify   —
            4

Equation at the end of step  1  :

  3    
  — -  20
  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 :

          20     20 • 4
    20 =  ——  =  ——————
          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:

 3 - (20 • 4)     -77
 ————————————  =  ———
      4            4 

Final result :

  -77             
  ——— = -19.25000 
   4