Every number that could be written into p/q form us a rational no. for example 2/3, 2.3 is also a rational number as it can further be converted as 23/10 which is a p/q form....hope it helps up vote if it helps

What is a Rational Number?
A rational number is a number that can be expressed as a fraction where both the numerator and denominator are integers, and the denominator is not equal to zero. In other words, a rational number can be written in the form a/b, where a and b are integers.

Characteristics of Rational Numbers:
- Rational numbers can be positive, negative, or zero.
- They can be expressed in decimal form, which either terminates or repeats.
- Rational numbers can be represented on a number line.

Examples of Rational Numbers:
- 1/2
- -3/4
- 5
- 0.25 (which is equivalent to 1/4)

Operations on Rational Numbers:
- Addition and subtraction of rational numbers involve finding a common denominator and then adding or subtracting the numerators.
- Multiplication of rational numbers involves multiplying the numerators and denominators.
- Division of rational numbers involves multiplying by the reciprocal of the divisor.

Identifying Rational Numbers:
- Any whole number can be expressed as a fraction by placing it over 1.
- Any terminating decimal can be expressed as a rational number.
- Any repeating decimal can be expressed as a rational number by setting up a pattern.
In conclusion, rational numbers play a significant role in mathematics as they encompass a wide range of numbers that can be expressed as fractions. Understanding rational numbers and their properties is essential for various mathematical operations and applications.