问一道数学题
Workingaloneatitsownconstantrate,amachinesealskcartonsin8hours,andworkingaloneatitsow...
Working alone at its own constant rate, a machine seals k cartons in 8 hours, and working alone at its own constant rate, a second machine seals k cartons in 4 hours. If the two machines, each working at its own constant rate and for the same period of time, together sealed a certain number of cartons, what percent of the cartons were sealed by the machine working at the faster rate?
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