# CLASS-7RECIPROCAL OF FRACTION

Reciprocal of a Number

A number is called the reciprocal of another number if the product of the two numbers is 1. To find the reciprocal of a number, write the number as a proper or improper fraction and then interchange the numerator and denominator, retaining the negative sign, if any, in the numerator.

Example.1)

Find the reciprocal of  11

11                  1

And.)  Reciprocal of 11 = (= --------  )  =  ---------

1                  11

Example.2)

5

Find the reciprocal of   3 --------

7

Ans.)

5                           26

reciprocal of  3 -------- = reciprocal of --------

7                           7

26               7

=   ( = --------- )  = --------   (Ans.)

7                26

Example.3)

3

Find the reciprocal of     - 2 -------

5

Ans.)                                                                                                      3                              13

reciprocal of - 2 -------  =  reciprocal of  - -------

5                               5

13                5

=  ( = - ------- ) = -  --------   (Ans.)

5                13