Final answer:
The missing denominator is 8.
Step-by-step explanation:
To find the missing denominator, we need to determine what the common denominator is between the fractions 2/8 and 3. The common denominator is the smallest number that both denominators can evenly divide into. In this case, the denominator for 2 and 2/8 is 8. Therefore, the missing denominator is 8.
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