Solution - Simplification or other simple results

Step  1  :

            12
 Simplify   ——
            13

Equation at the end of step  1  :

  10    12
  —— -  ——
  13    13

Step  2  :

            10
 Simplify   ——
            13

Equation at the end of step  2  :

  10    12
  —— -  ——
  13    13

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:

 10 - (12)     -2
 —————————  =  ——
    13         13

Final result :

  -2            
  —— = -0.15385 
  13