Solution - Adding, subtracting and finding the least common multiple

Step  1  :

            21
 Simplify   ——
            25

Equation at the end of step  1  :

   28    72     21
  (—— +  ——) +  ——
   10    10     25

Step  2  :

            36
 Simplify   ——
            5 

Equation at the end of step  2  :

   28    36     21
  (—— +  ——) +  ——
   10    5      25

Step  3  :

            14
 Simplify   ——
            5 

Equation at the end of step  3  :

   14    36     21
  (—— +  ——) +  ——
   5     5      25

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:

 14 + 36     10
 ———————  =  ——
    5        1 

Equation at the end of step  4  :

  10    21
  —— +  ——
  1     25

Step  5  :

Rewriting the whole as an Equivalent Fraction :

 5.1   Adding a fraction to a whole

Rewrite the whole as a fraction using  25  as the denominator :

           10     10 • 25
     10 =  ——  =  ———————
           1        25   

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:

 10 • 25 + 21     271
 ————————————  =  ———
      25          25 

Final result :

  271            
  ——— = 10.84000 
  25