RS Aggarwal Solutions for Class 8 Chapter 1 "Rational Numbers", a rational number is a number that is expressed as the ratio of two integers, where the denominator should not be equal to zero, whereas an irrational number cannot be expressed in the form of fractions. Rational numbers are terminating decimals, but irrational numbers are non-terminating. The word comes from "ratio". Examples: • 1/2 is a rational number (1 divided by 2, or the ratio of 1 to 2). Since we use rational numbers in our daily life likewise to calculate age, mass, simple arithmetic, date, etc. It makes so much fun in learning rational numbers and their fractions. It deals with rational numbers and their properties, standard form of rational number, representation of rational numbers on the real line, addition of rational numbers, subtraction of rational numbers, multiplication of rational numbers, division of rational numbers and word problems.