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a high school reports that it’s student sat scores were down by 9% in one year. The next year, however, the test scored rose by 20%. The high school principal announces, overall, test scores have improved
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a high school reports that it’s student sat scores were down by 9% in one year. The next year, however, the test scored rose by 20%. The high school principal announces, overall, test scores have improved by 11% over the past two years.

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