Solution - Adding, subtracting and finding the least common multiple

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "1.8" was replaced by "(18/10)". 3 more similar replacement(s)

Step  1  :

            9
 Simplify   —
            5

Equation at the end of step  1  :

   66     6     9
  (—— -  ——) -  —
   10    10     5

Step  2  :

            3
 Simplify   —
            5

Equation at the end of step  2  :

   66    3     9
  (—— -  —) -  —
   10    5     5

Step  3  :

            33
 Simplify   ——
            5 

Equation at the end of step  3  :

   33    3     9
  (—— -  —) -  —
   5     5     5

Step  4  :

Adding fractions which have a common denominator :

 4.1       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:

 33 - (3)     6
 ————————  =  —
    5         1

Equation at the end of step  4  :

  6    9
  — -  —
  1    5

Step  5  :

Rewriting the whole as an Equivalent Fraction :

 5.1   Subtracting a fraction from a whole

Rewrite the whole as a fraction using  5  as the denominator :

          6     6 • 5
     6 =  —  =  —————
          1       5  

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

 5.2       Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

 6 • 5 - (9)     21
 ———————————  =  ——
      5          5 

Final result :

  21           
  —— = 4.20000 
  5