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Answer:
Josiah ate 1/12 package more
Step-by-step explanation:
Each of them ate 1/2 package on one of the days. On the other day, Rodney ate 1/3 = 4/12 of the package, and Josiah ate 5/12 of the package.
Josiah ate 5/12 -4/12 = 1/12 more of the package of cookies.