Solution - Simplification or other simple results

Step  1  :

            7
 Simplify   —
            4

Equation at the end of step  1  :

         9           7
  (0 -  ——) -  (0 -  —)
        12           4

Step  2  :

            3
 Simplify   —
            4

Equation at the end of step  2  :

        3     -7
  (0 -  —) -  ——
        4     4 

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:

 -3 - (-7)     1
 —————————  =  —
     4         1

Final result :

  1