Answer:
3
Explanation:
Denominators
1/3= 2/3, 1, 1 1/3, 1 2/3, 2, 2 1/3, 2 2/3, 3
3/7= 6/7, 1 2/7, 1 5/7, 2 1/7, 2 4/7, 3
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