Solution - Simplification or other simple results

Step  1  :

            20
 Simplify   ——
            7 

Equation at the end of step  1  :

       20
  0 -  —— ÷ 1 ÷ 3
       7 

Step  2  :

         20      
 Divide  ——  by  1
         7       

Equation at the end of step  2  :

       20
  0 -  —— ÷ 3
       7 

Step  3  :

         20      
 Divide  ——  by  3
         7       

Equation at the end of step  3  :

       20
  0 -  ——
       21

Step  4  :

Final result :

  -20            
  ——— = -0.95238 
  21