Comparing Decimals and Fractions
To compare a decimal and a fraction,
first convert, or change, one of the numbers so that we have either two decimals or two fractions. Then, compare as usual.
For example: Let’s compare
1 2
and 0.72.
First, let's write the fraction as a decimal.
Write
1 2
as an equivalent fraction with 10 as the denominator.

= 

= 

Now, write
5 10
as a decimal.

=  0.5 
So, 

= 

=  0.5  . 
Now, compare 0.5 and 0.72.
As the tenth digit of 0.5 is less than the tenth digit of 0.72,
0.5 < 0.72
So, 

<  0.72  . 
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.