In Maths, a rational number is a type of real numbers, which is in the form of p/q where q is no equal come zero. Any portion with non-zero denominators is a rational number. Few of the examples of reasonable number are 1/2, 1/5, 3/4, and also so on. The number “0” is also a rational number, together we deserve to represent it in countless forms such as 0/1, 0/2, 0/3, etc. But, 1/0, 2/0, 3/0, etc. Room not rational, because they give us boundless values. Also, check irrational numbers here and also compare them through rational numerals.

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In this article, we will certainly learn about what is a reasonable number, the nature of rational numbers together with its types, the difference between rational and also irrational numbers, and solved examples. It helps to know the principles in a far better way. Also, learn the various rational number examples and learn just how to uncover rational numbers in a better way. To stand for rational number on a number line, we have to simplify and write in the decimal type first.

Let united state see what subject we are going come cover here in this article.

Table of contents:


What is a rational Number?

A reasonable number, in Mathematics, can be identified as any number which can be stood for in the form of p/q where q ≠ 0. Also, we can say that any fraction fits under the group of reasonable numbers, where the denominator and also numerator space integers and the denominator is not equal come zero. When the reasonable number (i.e., fraction) is divided, the result will it is in in decimal form, which may be one of two people terminating decimal or the repeating decimal. 

How to determine rational numbers?

To identify if a number is reasonable or not, check the below conditions.

It is stood for in the kind of p/q, wherein q≠0.The proportion p/q have the right to be additional simplified and represented in decimal form.

The set of rational numerals:

Include positive, negative numbers, and zeroCan it is in expressed together a fraction

Examples of rational Numbers: 





210/2 =5



10001/1000 = 0.001



1050/10 = 5


Types of rational Numbers

A number is reasonable if we can write it together a fraction, wherein both denominator and also numerator space integers and also the denominator is a non-zero number.

The below diagram helps united state to understand much more about the number sets.


Real numbers (R) encompass all the rational numbers (Q).Real numbers incorporate the integers (Z).Integers involve herbal numbers(N).Every totality number is a reasonable number since every whole number can be expressed together a fraction.

Standard kind of rational Numbers

The standard form of a rational number have the right to be defined if it’s no usual factors as well as one in between the dividend and also divisor and also therefore the divisor is positive.

For example, 12/36 is a rational number. However it can be simplified as 1/3; usual factors in between the divisor and dividend is only one. For this reason we can say that rational number ⅓ is in conventional form.

Positive and an unfavorable Rational Numbers

As we know that the rational number is in the form of p/q, wherein p and q room integers. Also, q need to be a non-zero integer. The rational number have the right to be either hopeful or negative. If the rational number is positive, both p and also q are hopeful integers. If the reasonable number takes the form -(p/q), climate either ns or q takes the negative value. It means that

-(p/q) = (-p)/q = p/(-q).

Now, let’s comment on some that the examples of optimistic and an unfavorable rational numbers.

Positive rational NumbersNegative rational Numbers
If both the numerator and also denominator room of the same signs.If numerator and denominator room of opposite signs.
All are better than 0All are much less than 0
Examples of confident rational numbers: 12/17, 9/11 and 3/5Examples of negative rational numbers: -2/17, 9/-11 and -1/5.

Arithmetic to work on rational Numbers

In Maths, arithmetic operations room the simple operations we carry out on integers. Allow us comment on here how we deserve to perform these operations on reasonable numbers, speak p/q and s/t.

Addition: as soon as we include p/q and s/t, we must make the denominator the same. Hence, we get (pt+qs)/qt.

Example: 1/2 + 3/4 = (2+3)/4 = 5/4

Subtraction: Similarly, if us subtract p/q and also s/t, climate also, we have to make the denominator same, first, and then do the subtraction.

Example: 1/2 – 3/4 = (2-3)/4 = -1/4

Multiplication: In situation of multiplication, while multiplying 2 rational numbers, the numerator and also denominators the the reasonable numbers space multiplied, respectively. If p/q is multiplied by s/t, then we get (p×s)/(q×t).

Example: 1/2 × 3/4 = (1×3)/(2×4) = 3/8

Division: If p/q is split by s/t, climate it is represented as:(p/q)÷(s/t) = pt/qs

Example: 1/2 ÷ 3/4 = (1×4)/(2×3) = 4/6 = 2/3

Multiplicative station of reasonable Numbers

As the reasonable number is represented in the kind p/q, which is a fraction, then the multiplicative train station of the reasonable number is the reciprocal of the given fraction.

For example, 4/7 is a rational number, then the multiplicative inverse of the reasonable number 4/7 is 7/4, such the (4/7)x(7/4) = 1

Rational number Properties

Since a reasonable number is a subset of the real number, the reasonable number will obey all the nature of the genuine number system. Some of the important properties the the reasonable numbers space as follows:

The outcomes are constantly a rational number if we multiply, add, or subtract any two reasonable numbers.A rational number continues to be the same if we divide or main point both the numerator and also denominator v the very same factor.If we add zero come a rational number then us will obtain the exact same number itself.Rational numbers space closed under addition, subtraction, and multiplication.

Learn much more properties of rational number here.

Rational Numbers and also Irrational Numbers

There is a difference between rational and Irrational Numbers. A portion with non-zero denominators is referred to as a rational number. The number ½ is a rational number because it is read as essence 1 split by creature 2. All the numbers that are not rational are dubbed irrational. Examine the graph below, come differentiate in between rational and also irrational.


Rationals have the right to be one of two people positive, an unfavorable or zero. While specifying a an adverse rational number, the an adverse sign is one of two people in former or with the numerator of the number, i m sorry is the traditional mathematical notation. For example, we denote an adverse of 5/2 as -5/2.

An irrational number can not be created as a simple portion but deserve to be stood for with a decimal. The has countless non-repeating digits after the decimal point. Few of the common irrational number are:

Pi (π) = 3.142857…

Euler’s Number (e) = 2.7182818284590452…….

√2 = 1.414213…

How to discover the reasonable Numbers between Two reasonable Numbers?

There space “n” number of reasonable numbers between two rational numbers. The rational numbers in between two reasonable numbers can be uncovered easily utilizing two different methods. Now, let us have actually a look in ~ the two various methods.

Method 1: 

Find the end the equivalent fraction for the offered rational numbers and also find out the rational number in between them. Those numbers need to be the required rational numbers.

Method 2: 

Find out the average value for the two offered rational numbers. The typical value have to be the forced rational number. In order come find an ext rational numbers, repeat the same procedure with the old and the newly derived rational numbers.

Solved Examples

Example 1:

Identify each of the complying with as irrational or rational: ¾ , 90/12007, 12 and also √5.


since a rational number is the one that have the right to be expressed as a ratio. This shows that it can be expressed together a fraction wherein both denominator and numerator are entirety numbers.

¾ is a rational number as it can be expressed together a fraction. 3/4 = 0.75Fraction 90/12007 is rational.12, likewise be written as 12/1. Again a reasonable number.Value of √5 = 2.2360679775…….. It is a non-terminating value and also hence cannot be created as a fraction. It is one irrational number.

Example 2:

Identify whether combined fraction, 11/2 is a rational number.


The Simplest kind of 11/2 is 3/2

Numerator = 3, which is an integer

Denominator = 2, is one integer and not same to zero.

So, yes, 3/2 is a rational number.

Example 3:

Determine even if it is the offered numbers are rational or irrational.

(a) 1.75 (b) 0.01 (c) 0.5 (d) 0.09 (d) √3


The provided numbers room in decimal format. To find whether the provided number is decimal or not, we have actually to transform it into the fraction type (i.e., p/q)

If the denominator of the fraction is not equal come zero, climate the number is rational, or else, it is irrational.

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A reasonable number is a number that is in the kind of p/q, where p and q space integers, and also q is not equal to 0. Several of the examples of reasonable number include 1/3, 2/4, 1/5, 9/3, and so on.

A rational number is a number that is expressed as the proportion of 2 integers, where the denominator need to not be same to zero, whereas an irrational number cannot be expressed in the form of fractions. Rational numbers room terminating decimals yet irrational numbers room non-terminating. Example of the reasonable number is 10/2, and for an irrational number is a renowned mathematical worth Pi(π) i m sorry is equal to 3.141592653589…….

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Yes, 0 is a rational number since it is one integer, that can be composed in any type such together 0/1, 0/2, whereby b is a non-zero integer. It deserve to be composed in the form: p/q = 0/1. Hence, us conclude the 0 is a rational number.