http://clerk.house.gov/member_info/electionInfo/index.aspx

Elections are a place where dividing by fractions is often what you want to do for obvious questions.

If 3/4 of people in Ohio voted for Republicans for House and 1/2 in Ohio voted for Obama, and we assume the only crossovers are Republican votes for House, then 1/4 crossed over and the percentage of Republicans who crossed over is 1/4 divided by 3/4, which is 1/3 or 1 in 3.

Paul Krugman claims preliminary indications that more people voted for Dems in the House than GOP in 2012.

http://www.nytimes.com/2012/11/09/opinion/krugman-lets-not-make-a-deal.html?_r=1&

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Author of Pre-Algebra New Math Done Right Peano Axioms. A below college level self study book on the Peano Axioms and proofs of the associative and commutative laws of addition.
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