Solution - Simplification or other simple results

Step  1  :

            5
 Simplify   —
            7

Equation at the end of step  1  :

  4    5
  — -  —
  7    7

Step  2  :

            4
 Simplify   —
            7

Equation at the end of step  2  :

  4    5
  — -  —
  7    7

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:

 4 - (5)     -1
 ———————  =  ——
    7        7 

Final result :

  -1            
  —— = -0.14286 
  7