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2015-06-08T11:48:57+05:30

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0.9 is already a rational number.
A rational number is of the form p/q were p and q are whole numbers and q≠ 0.
Here , p=9 and q=10 so the fraction stands 9/10=0.9
Ans:0.9 is itself a rational number.which is expressed as 9/10.
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2015-06-08T12:14:52+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
A number is said to be a rational number when it is expressed in the form of p/q where p and q are whole numbers and q not equal to 0
 so 0.9 can be written in the form of fraction as 9/10
   so 0.9 is a rational number.
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