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e. \(\cfrac{2}{3} - \cfrac{2}{5} =\)
f. \(\cfrac{5}{7} - \cfrac{2}{3} =\)
Robin used \(\cfrac{1}{4}\) of a pound of butter to make a cake. Before she started, she had \(\cfrac{7}{8}\) of a pound of butter. How much butter did Robin have when she was done baking? Give your answer as a fraction of a pound.
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