What percentage of the current fourth graders at Liberation Elementary School dressed in costume for Halloween for the past two years in a row (both this year and last year)?
1) \(60\%\) of the current fourth graders at Liberation Elementary School dressed in costume for Halloween this year
2) Of the current fourth graders at Liberation Elementary School who did not dress in costume for Halloween this year, \(80\%\) did not dress in costume last year
The OA is E
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