thus -7/21 and3/9represent the same rational number
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no they not represent the same rational number because -7 by 21 is equal to - 1 by 3 and 3 by 9 is equal to 1 by 3
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No because if we write these numbers in standard form then -7/21 will be equal to -1/3 and 3/9 will be equal to 1/3. So one is negative and the other is positive. Thus , they’re not same
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