Answer:
6/7
Explanation:
Add 2/7 and 8/14:
Recognize that the LCD is 14. Rewrite 2/7 as 4/14.
Then 4/14 + 8/14 = 12/14. This reduces to 6/7.
Ken ate 6/7 of the chocolate bar in two days.
In decimal form it would be 0.85714285714
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