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Why are rational numbers important?

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  • Last Updated : 31 Mar, 2022
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A number is a numerical worth utilized for counting and estimating objects, and for performing number-crunching computations. Numbers have different classes like normal numbers, entire numbers, objective and unreasonable numbers, etc. Additionally, there are different kinds of number frameworks that have various properties, similar to the double number framework, the octal number framework, the decimal number framework, and the hexadecimal number framework.

Number Systems

A number framework is a framework addressing numbers. It is additionally called the arrangement of numeration and it characterizes a bunch of values to address an amount. These numbers are utilized as digits and the most widely recognized ones are 0 and 1, which are utilized to address paired numbers. Digits from 0 to 9 are utilized to address different sorts of number frameworks.


A number framework is characterized as the portrayal of numbers by involving digits or different images in a predictable way. The worth of any digit in a number is not entirely set in stone by a digit, its situation in the number, and the foundation of the number framework. The numbers are addressed in an extraordinary way and permit us to work on math tasks like expansion, deduction, and division. Let’s take a look at the types of number systems,

  • Binary Number System

The paired or doubled or binary number framework utilizes just two digits: 0 and 1. The numbers in this framework have a base of 2. Digits 0 and 1 are assembled pieces and 8 pieces make a byte. The information in PCs is put away as far as pieces and bytes. The twofold number framework doesn’t manage different numbers, for example, 2, 3, 4, 5, etc. For instance: 100012, 1111012, 10101012 are a few instances of numbers in the parallel number framework or number system.

  • Octal Number System

The octal number framework utilizes eight digits: 0,1,2,3,4,5,6 and 7 with the foundation of 8. The benefit of this framework is that it has lesser digits when contrasted with a few different frameworks, henceforth, there would be fewer computational mistakes. Digits like 8 and 9 are excluded from the octal number framework. Similarly, like the double, the octal number framework is utilized in minicomputers yet with digits from 0 to 7. For instance: 358, 238, 1418 are a few instances of numbers in the octal number framework

  • Decimal Number System

The decimal number framework utilizes ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 with the base number as 10. The decimal number framework is the framework that we by and large use to address numbers, all things considered. Assuming any number is addressed without a base, it implies that its base is 10. For instance: 72310, 3210, 425710 are a few instances of numbers in the decimal number framework.

  • Hexadecimal Number System

The hexadecimal number framework utilizes sixteen digits/letter sets: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and A, B, C, D, E, F with the base number as 16. Here, A-F of the hexadecimal framework implies the numbers 10-15 of the decimal number framework individually. This framework is utilized in PCs to decrease the enormous measured strings of the double framework. For instance: 7B316, 6F16, 4B2A16 are a few instances of numbers in the hexadecimal number framework.

Rational numbers

Levelheaded numbers or rational numbers are one extremely normal sort of number that we ordinarily study after whole numbers in math. These numbers are as p/q, where p and q can be any number and q ≠ 0. Most frequently individuals observe it confounding to separate among parts and judicious numbers due to the essential design of numbers, that is p/q structure. Divisions are comprised of entire numbers while judicious numbers are comprised of whole numbers as their numerator and denominator. We should look further into reasonable numbers in this illustration


An objective number or rational number is a number that is of the structure p/q where p and q are whole numbers and q isn’t equivalent to 0. The arrangement of reasonable numbers is signified by Q. At the end of the day, If a number can be communicated as a portion where both the numerator and the denominator are numbers, the number is an objective number.

Examples of rational numbers

In the event that a number can be communicated as a part where both the numerator and the denominator are whole numbers, the number is a reasonable number. A few instances of sane numbers are 1/2, 2/3, 0.30 or 30/10, -0.7 or – 7/10, 0.141414… or on the other hand 14/99.

Why are rational numbers important?


Normal numbers or rational numbers are required in light of the fact that there are numerous amounts or measures that regular numbers or numbers alone will not enough depict. Estimation of amounts, whether length, mass, or time, is what is going on.

This is the significance of nonsensical numbers. They fill in the holes and let people model the world in a predictable, smooth, and basic way. They are the magic that binds everything. The sane number line has a larger number of openings than substance. The unreasonable numbers fill those openings to give us what we call genuine numbers, however, there’s nothing true about them. They are essentially the right, most basic method for depicting lines, calculation, capacities, time, the world.

Integers along cannot describe many things, such as the measurements of quantities, etc. Here. rational numbers are required and hence, are introduced in the mathematical system. Reasonable numbers are involved wherever in the day to day existence. How much pocket cash one gets. That is an objective number. In the event that one goes through some sum out of it, it is deduction of reasonable number.

Assuming someone is a competitor, the running race includes levelheaded numbers. Distance to be run, time taken to run the distance, number of members in a race, starting things out or second or third, number of heart beats you require consistently and so on, are generally reasonable numbers.

Rational numbers are genuine numbers which can be written as a/b where a, b are whole numbers and b ≠ 0. We use charges as parts. At the point when you share a pizza or anything. Financing costs on advances and home loans. So that rational numbers are very important 

Sample Questions

Question 1: Find a rational number between the following: 4/2 and 9/3?.


We realize that the normal of any two numbers lies between the two numbers. We should track down the normal of the given two judicious numbers.

= (4/2) + (9 + 3)/2

= (12/6) + (18 + 6)/2

= (30/6)/(2/1) (When the denominator is null take /1)

= (30/6) × (1/2)

= 30/12

Therefore, the rational number is 30/12

Question 2: Is 0 a Rational Number?


Indeed, 0 is a levelheaded number as we can compose it as 0/1 where 0 and 1 are numbers and the denominator isn’t equivalent to 0. So, 0 is a rational number.

Question 3: What are the Properties of Rational Numbers?


There are six properties of judicious numbers, which are recorded underneath:

  1. Conclusion Property of Rational Numbers
  2. Commutative Property of Rational Numbers
  3. Affiliated Property of Rational Numbers
  4. Distributive Property of Rational Numbers
  5. Multiplicative Property of Rational Numbers
  6. Added substance Property of Rational Numbers

Question 4: What numbers are known to be rational numbers, give examples.


Numbers that are in the form of p/q where q is not equal to 0. Rational numbers are also known as the terminating or repeating decimal. For example, 1/4, 3/2, 45.676767…, etc. All these examples are the examples of rational numbers.

Question 5: Depict which of the given numbers are rational numbers.

  1. 22.2222…
  2. 345.9865349
  3. 12/0
  4. 456738.097237789…..
  5. 99


  1. 22.2222… is a rational number as it is repeating in nature.
  2. 345.9865349 is a rational number as it is terminating in nature.
  3. 12/0 is not a rational number as q which is the denominator is not equal to 0.
  4. 456738.097237789… is not a rational number as it is not repeating not terminating in nature.
  5. 99 is a rational number.
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