RS Aggarwal Solutions for Class 7 Chapter 2 “Fractions”, a fraction represents parts of a whole. The denominator b is the number of equal parts the whole has been divided into, and the numerator indicates how many parts are included. A mixed number consists of a whole number a and a fraction bc where c is not equals to 0. It is written as abc, where c is not equals to 0. In Class 7 and take up multiplication and division of fractions along with some other concepts, like types of fraction, method of changing unlike fractions to like fractions, method of comparing more than two fractions, reciprocal of the fraction.