Verified Answer :

The answer is 3 21/100.

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Answer:

\(\frac{321}{100}\).

Step-by-step explanation:

Given  : 3.21

To find : Explain how to write the rational number.

Solution : We have given  3.21

We can remove the decimal.

We can see there are two numbers after decimal so, we write the 100 in denominator.

\(\frac{321}{100}\).

So, this is the \(\frac{a}{b}\).

a = 321 , b =100

Therefore, \(\frac{321}{100}\).