Reciprocal of 99
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Theorem
The decimal expansion of the reciprocal of $99$ is:
- $\dfrac 1 {99} = 0 \cdotp \dot 0 \dot 1$
This sequence is A000035 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).
Proof
Performing the calculation using long division:
0.0101... ---------- 99)1.0000000 99 -- 100 99 --- ...
$\blacksquare$
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $99$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $99$