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9 repeating = infinity.

If you mean 0.9999... repeating as a fraction, that is equal to 1.

Proof:

1/3 = 0.3 repeating (0.3333...)

2/3 = 0.6 repeating (0.6666...)

1/3 + 2/3 = 3/3 = 1

0.3333... + 0.6666... = 0.9999...

0.9999... = 1

End of Proof:

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Q: What is 9 repeating as a fraction?
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