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  2. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    In general, if an increase of x percent is followed by a decrease of x percent, and the initial amount was p, the final amount is p (1 + 0.01 x)(1 − 0.01 x) = p (1 − (0.01 x) 2); hence the net change is an overall decrease by x percent of x percent (the square of the original percent change when expressed as a decimal number).

  3. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    In statistics, a k-th percentile, also known as percentile score or centile, is a score (e.g., a data point) below which a given percentage k of arranged scores in its frequency distribution falls ("exclusive" definition) or a score at or below which a given percentage falls ("inclusive" definition); i.e. a score in the k-th percentile would be above approximately k% of all scores in its set.

  4. Flesch–Kincaid readability tests - Wikipedia

    en.wikipedia.org/wiki/Flesch–Kincaid...

    "The Flesch–Kincaid" (F–K) reading grade level was developed under contract to the U.S. Navy in 1975 by J. Peter Kincaid and his team. [1] Related U.S. Navy research directed by Kincaid delved into high-tech education (for example, the electronic authoring and delivery of technical information), [2] usefulness of the Flesch–Kincaid readability formula, [3] computer aids for editing tests ...

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  6. Percent sign - Wikipedia

    en.wikipedia.org/wiki/Percent_sign

    English style guides prescribe writing the percent sign following the number without any space between (e.g. 50%). [sources 1] However, the International System of Units and ISO 31-0 standard prescribe a space between the number and percent sign, [8] [9] [10] in line with the general practice of using a non-breaking space between a numerical value and its corresponding unit of measurement.

  7. Wikipedia:Two times does not mean two times more - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Two_times_does...

    300% as many cookies is 200% more than we started with. Three cookies is 300%, and that means that three cookies is 200% more than one cookie. The two-cookie increase means that the amount has increased by 200%. That's because % = % + %. The part that is actually "more than" the first cookie's 100% is the second and third cookie's combined 200%.

  8. Reading comprehension - Wikipedia

    en.wikipedia.org/wiki/Reading_comprehension

    The National Assessment of Educational Progress assessed U.S. student performance in reading at grade 12 from both public and private school population and found that only 37 percent of students had proficient skills. The majority, 72 percent of the students, were only at or above basic skills, and 28 percent of the students were below basic level.

  9. Reading - Wikipedia

    en.wikipedia.org/wiki/Reading

    Reading is the process of taking in the sense or meaning of symbols, often specifically those of a written language, by means of sight or touch. [1] [2] [3] [4]For educators and researchers, reading is a multifaceted process involving such areas as word recognition, orthography (spelling), alphabetics, phonics, phonemic awareness, vocabulary, comprehension, fluency, and motivation.