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At Pedantic Publishing Corporation,$$\frac{1}{5}$$ of the employees take the bus to work and $$\frac{1}{3}$$ drive to work. Of the employees who do not take the bus or drive to work, $$\frac{1}{4}$$ take the subway and the rest either walk or ride a bicycle. If $$\frac{1}{7}$$ of the remaining employees ride a bicycle to work, what fraction of the employees walks to work?_____

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