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The reciprocal of a number is 1 divided by that number; to find the reciprocal of a fraction, this amounts to inverting the fraction.

  • I guess that is the mixed number 1 1/9.

Convert to an improper fraction and then invert it:

1/(1 1/9) = 1/((9×1+1)/9) = 1/(10/9) = 9/10

  • If that is the fraction 1/19, then:

1/(1/19) = 19/1 = 1

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Q: What is the reciprocal of 1 19?
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