Solution - Adding, subtracting and finding the least common multiple

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.0000042" was replaced by "(0000042/10000000)". 2 more similar replacement(s)

Step  1  :

               21  
 Simplify   ———————
            5000000

Equation at the end of step  1  :

    787         21  
  ——————— -  ———————
  1000000    5000000

Step  2  :

              787  
 Simplify   ———————
            1000000

Equation at the end of step  2  :

    787         21  
  ——————— -  ———————
  1000000    5000000

Step  3  :

Calculating the Least Common Multiple :

 3.1    Find the Least Common Multiple

      The left denominator is :       1000000 

      The right denominator is :       5000000 

      Least Common Multiple:
      5000000 

Calculating Multipliers :

 3.2    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 = 5

   Right_M = L.C.M / R_Deno = 1

Making Equivalent Fractions :

 3.3      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.      787 • 5
   ——————————————————  =   ———————
         L.C.M             5000000

   R. Mult. • R. Num.         21  
   ——————————————————  =   ———————
         L.C.M             5000000

Adding fractions that have a common denominator :

 3.4       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:

 787 • 5 - (21)       1957 
 ——————————————  =  ———————
    5000000         2500000

Final result :

    1957            
  ——————— = 0.00078 
  2500000