Solution - Adding, subtracting and finding the least common multiple

Step  1  :

            5
 Simplify   —
            6

Equation at the end of step  1  :

   1    1     5
  (— +  —) -  —
   8    9     6

Step  2  :

            1
 Simplify   —
            9

Equation at the end of step  2  :

   1    1     5
  (— +  —) -  —
   8    9     6

Step  3  :

            1
 Simplify   —
            8

Equation at the end of step  3  :

   1    1     5
  (— +  —) -  —
   8    9     6

Step  4  :

Calculating the Least Common Multiple :

 4.1    Find the Least Common Multiple

      The left denominator is :       8 

      The right denominator is :       9 

      Least Common Multiple:
      72 

Calculating Multipliers :

 4.2    Calculate multipliers for the two fractions


    Denote the Least Common Multiple by  L.C.M 
    Denote the Left Multiplier by  Left_M 
    Denote the Right Multiplier by  Right_M 
    Denote the Left Deniminator by  L_Deno 
    Denote the Right Multiplier by  R_Deno 

   Left_M = L.C.M / L_Deno = 9

   Right_M = L.C.M / R_Deno = 8

Making Equivalent Fractions :

 4.3      Rewrite the two fractions into equivalent fractions

Two fractions are called equivalent if they have the same numeric value.

For example :  1/2   and  2/4  are equivalent,  y/(y+1)²   and  (y²+y)/(y+1)³  are equivalent as well.

To calculate equivalent fraction , multiply the Numerator of each fraction, by its respective Multiplier.

   L. Mult. • L. Num.       9
   ——————————————————  =   ——
         L.C.M             72

   R. Mult. • R. Num.       8
   ——————————————————  =   ——
         L.C.M             72

Adding fractions that have a common denominator :

 4.4       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 + 8     17
 —————  =  ——
  72       72

Equation at the end of step  4  :

  17    5
  —— -  —
  72    6

Step  5  :

Calculating the Least Common Multiple :

 5.1    Find the Least Common Multiple

      The left denominator is :       72 

      The right denominator is :       6 

      Least Common Multiple:
      72 

Calculating Multipliers :

 5.2    Calculate multipliers for the two fractions


    Denote the Least Common Multiple by  L.C.M 
    Denote the Left Multiplier by  Left_M 
    Denote the Right Multiplier by  Right_M 
    Denote the Left Deniminator by  L_Deno 
    Denote the Right Multiplier by  R_Deno 

   Left_M = L.C.M / L_Deno = 1

   Right_M = L.C.M / R_Deno = 12

Making Equivalent Fractions :

 5.3      Rewrite the two fractions into equivalent fractions

   L. Mult. • L. Num.      17
   ——————————————————  =   ——
         L.C.M             72

   R. Mult. • R. Num.      5 • 12
   ——————————————————  =   ——————
         L.C.M               72  

Adding fractions that have a common denominator :

 5.4       Adding up the two equivalent fractions

 17 - (5 • 12)     -43
 —————————————  =  ———
      72           72 

Final result :

  -43            
  ——— = -0.59722 
  72