400616065 400616065

03-09-2021
Mathematics

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0.21212121... as a fraction

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LammettHash LammettHash

03-09-2021

If x = 0.212121…, then 100x = 21.212121…, so we have

100x - x = 21.212121… - 0.212121…

99x = 21

x = 21/99 = 7/33

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