what is standard form in rational numbers?explain briefly

@Isha: You had correctly explained the definition of rational number.

consider a rational number 18/(-26). It can be represented in standard form as:

18/(-26) = -9/13 (in standard form)

Similarly, -56/91 = -8/13 (in standard form)

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A rational number is said to be in the standard form if its denominator is a positive integer and the numerator and the denominator have no common factor other than 1 . 
If a rational number is not in the standard form , then it can be reduced to the standard form .
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