Divide one by three and you get 0.33333 repeating. Double it and you get 0.66666 repeating. Add another 0.33333 (repeating) and you get 0.99999 (repeating). Therefore 0.99999 (repeating) is exactly equal to one.

You are kidnapped and awake to find yourself laying on a hospital bed, connected by several tubes to an unconscious man in the bed beside you. You are told that the tubes are doing you no harm but are keeping him alive, and you should remain attached by the tubes for a further nine months or the man will die -- although there is nothing preventing [...]