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5/7 - 7/14 becomes: 10/14 - 7/14. Then subtract across to get the final answer: 3/14.

5/7 became 10/14 by finding the lowest common denominator which is 14. Then you figure 7 goes into 14 two times, and 2x5 = 10 therefore 5/7 becomes 10/14.

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13y ago

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