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  2. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    A pie chart showing the percentage by web browser visiting Wikimedia sites (April 2009 to 2012) In mathematics, a percentage (from Latin per centum 'by a hundred') is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign (%), [1] although the abbreviations pct., pct, and sometimes pc are also used. [2]

  3. Data and information visualization - Wikipedia

    en.wikipedia.org/wiki/Data_and_information...

    Part-to-whole: Categorical subdivisions are measured as a ratio to the whole (i.e., a percentage out of 100%). A pie chart or bar chart can show the comparison of ratios, such as the market share represented by competitors in a market.

  4. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  5. Percent sign - Wikipedia

    en.wikipedia.org/wiki/Percent_sign

    The percent sign % (sometimes per cent sign in British English) is the symbol used to indicate a percentage, a number or ratio as a fraction of 100. Related signs include the permille (per thousand) sign ‰ and the permyriad (per ten thousand) sign ‱ (also known as a basis point), which indicate that a number is divided by one thousand or ten thousand, respectively.

  6. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    6 1 2 1 1 −1 4 5 9. and would be written in modern notation as 6 ⁠ 1 / 4 ⁠, 1 ⁠ 1 / 5 ⁠, and 2 − ⁠ 1 / 9 ⁠ (i.e., 1 ⁠ 8 / 9 ⁠). The horizontal fraction bar is first attested in the work of Al-Hassār (fl. 1200), [35] a Muslim mathematician from Fez, Morocco, who specialized in Islamic inheritance jurisprudence.

  7. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    In scientific notation, this is written 5.9724 × 10 24 kg. The Earth's circumference is approximately 40 000 000 m. [22] In scientific notation, this is 4 × 10 7 m. In engineering notation, this is written 40 × 10 6 m. In SI writing style, this may be written 40 Mm (40 megametres). An inch is defined as exactly 25.4 mm.

  8. Irreducible fraction - Wikipedia

    en.wikipedia.org/wiki/Irreducible_fraction

    For example, ⁠ 1 / 4 ⁠, ⁠ 5 / 6 ⁠, and ⁠ −101 / 100 ⁠ are all irreducible fractions. On the other hand, ⁠ 2 / 4 ⁠ is reducible since it is equal in value to ⁠ 1 / 2 ⁠, and the numerator of ⁠ 1 / 2 ⁠ is less than the numerator of ⁠ 2 / 4 ⁠. A fraction that is reducible can be reduced by dividing both the numerator ...

  9. Margin of error - Wikipedia

    en.wikipedia.org/wiki/Margin_of_error

    Each interval reflects the range within which one may have 95% confidence that the true percentage may be ... 5.326 723 886 384: 0.9975 2.807 ... (after simplifying),