1/7 + 1/3 = 3/21 + 7/21 = 10/21
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To add one third and one seventh, we need to find a common denominator. The least common multiple of 3 and 7 is 21. So, we can rewrite one third as 7/21 and one seventh as 3/21. Adding these fractions together, we get 7/21 + 3/21 = 10/21. Therefore, one third plus one seventh is 10/21.
1 whole, or 1
0.64285714285or 9/14
One and one twelfth
1/3 minus 1/7 is 4/21.