The fraction given simply illustrates that the difference in the time taken will be 1/12.
Your information is incomplete. Therefore, an overview will be given based on the information provided.
In this case, each Monday, Jill ran 6/12 of an hour and donna ran 5/12 of an hour. It can be deduced that the difference between the time taken will be:
= 6/12 - 5/12
= 1/12
In conclusion, the correct option is 1/12.
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