2/3,4/7,__/__,11/21,16/31
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Answer:
7/13 is answer
Pattern
1/1, 2/3, 4/7, 7/13, 11/21, 16/31.
Numerator : in each case the pattern is (n+1) is added
Denominator : in each case the pattern is ( n+ 2) is added.
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