Converting Decimals to Fractions
We know that decimals are fractions that have powers of ten as their denominators.
To write a decimal as a fraction, we use place values.
For example:
Consider the decimal 0.15.
It can be written in the place value chart as follows:
Ones  .  Tenths  Hundredths 
0  .  1  5 
We know that 1 tenth is same as 10 hundredths.
So, 0.15 is 15 hundredths.
Now, write 15 hundredths as a fraction.
15 hundredths = 

Now, simplify the fraction.

= 

= 

So, the decimal 0.15 can be written as the fraction
3 20
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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.