Solution - Simplification or other simple results

Step  1  :

            21
 Simplify   ——
            5 

Equation at the end of step  1  :

  42    21
  —— -  ——
  5     5 

Step  2  :

            42
 Simplify   ——
            5 

Equation at the end of step  2  :

  42    21
  —— -  ——
  5     5 

Step  3  :

Adding fractions which have a common denominator :

 3.1       Adding fractions which have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

 42 - (21)     21
 —————————  =  ——
     5         5 

Final result :

  21           
  —— = 4.20000 
  5