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If you mean 3/8 and 7/8 then they are 1/4 and 1/2.
The mean is 4.55... recurring.
The mean is (8 + 7 + 10 + 14 + 1)/5 = 8
No. 2 + 7 - 8 = 1 8 + 7 - 2 = 13
If you mean: 81/2 divided by 21/4 then it is 54/7 or 7 and 5/7