Solution - Adding, subtracting and finding the least common multiple

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "3.9" was replaced by "(39/10)". 3 more similar replacement(s)

Step  1  :

            39
 Simplify   ——
            10

Equation at the end of step  1  :

   108    18     39
  (——— -  ——) -  ——
   10     10     10

Step  2  :

            9
 Simplify   —
            5

Equation at the end of step  2  :

   108    9     39
  (——— -  —) -  ——
   10     5     10

Step  3  :

            54
 Simplify   ——
            5 

Equation at the end of step  3  :

   54    9     39
  (—— -  —) -  ——
   5     5     10

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:

 54 - (9)     9
 ————————  =  —
    5         1

Equation at the end of step  4  :

  9    39
  — -  ——
  1    10

Step  5  :

Rewriting the whole as an Equivalent Fraction :

 5.1   Subtracting a fraction from a whole

Rewrite the whole as a fraction using  10  as the denominator :

          9     9 • 10
     9 =  —  =  ——————
          1       10  

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:

 9 • 10 - (39)     51
 —————————————  =  ——
      10           10

Final result :

  51           
  —— = 5.10000 
  10