Math Grade 6 Ratios, Rates, & Percents - Model Curriculum Unit

One annoying (to me, anyhow) tendency these days is to compare, by subtraction, the percentage of support for one candidate for political office with the percentage of support for another candidate when they are the only two candidates for that office. For example: “Smith is leading Jones by 80% to 20%, a difference of 60 points.” Of course. ................
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