Add Mixed Numbers with Unlike Denominators
To add mixed numbers, we first add the whole number parts together, and then the fraction parts.
For example: Let's find the sum of:

+ 

Add the whole parts.
5 + 2 = 7
Now, add the fraction parts.

+ 

Find the least common multiple of 7 and 4.
Least common multiple of 7 and 4 is 28.
So, least common denominator = 28
Now, rewrite both the fractions with denominator 28 .

× 

= 


× 

= 

Now, add:

+ 

= 

+ 

= 

= 

Now, write the sum of whole parts and fraction parts together.
7 

So, the required sum is 

. 
ds
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Help
The correct answer is
Remember :
The smallest number is the one that comes first while counting.
Solution :
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21,27,23
21 is the smallest number.