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In the order of operations, division comes before addition. Thus, the two divisions are done first (6/8 and 1/7) then the results of these are added, giving 6/8 + 1/7 = 25/28.
6/7
6 over 7 of course !
7 over 24.
1/3 + 5/6 = 7/6 or 11/6
4/5 + 6/7 is 1 23/35
6/7 + 1/3 = 14/21
6/7 = 0.86
7/27 + 1/6 = 23/54
They add up to 7/6 or 1 and 1/6
6/7 + 1/6 = 36/42 + 7/42 = 43/42 = 11/42
13/42
6/7 + 3/7 = 9/7 or 1 2/7
6/7+1/3 = 25/21