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Im going to give you the proof as well... but it is 8/9

x=0.8888888888....

10x=8.8888888....

9x=10x-x=8

if 9x = 8 then x=8/9

btw 0.12121212... is 12/99

and 0.487487487487... is 487/999
8/9

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7y ago

What else can I help you with?