2/7 + 1/14
We need to determine a common denominator for each term 2/7 + 1/14
In this usage, the word "common" means they're the same
By observation we see that one common denominator is 14
So multiply 2/7 by 2/2 to obtain 4/14 4/14 + 1/14
Now the addition is simple 4/14 + 1/14 = 5/14
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