Solution - Simplification or other simple results

Step  1  :

             9
 Simplify   ——
            10

Equation at the end of step  1  :

   7     9
  —— -  ——
  10    10

Step  2  :

             7
 Simplify   ——
            10

Equation at the end of step  2  :

   7     9
  —— -  ——
  10    10

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:

 7 - (9)     -1
 ———————  =  ——
   10        5 

Final result :

  -1            
  —— = -0.20000 
  5