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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. One half - Wikipedia

    en.wikipedia.org/wiki/One_half

    u+00be ¾ vulgar fraction three quarters The "one-half" symbol has its own code point as a precomposed character in the Number Forms block of Unicode , rendering as ½ . The reduced size of this symbol may make it illegible to readers with relatively mild visual impairment ; consequently the decomposed forms 1 ⁄ 2 or ⁠ 1 / 2 ⁠ may be more ...

  4. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    For example, the conversion factor between a mass fraction of 1 ppb and a mole fraction of 1 ppb is about 4.7 for the greenhouse gas CFC-11 in air (Molar mass of CFC-11 / Mean molar mass of air = 137.368 / 28.97 = 4.74). For volume fraction, the suffix "V" or "v" is sometimes appended to the parts-per notation (e.g. ppmV, ppbv, pptv).

  5. Alcohol proof - Wikipedia

    en.wikipedia.org/wiki/Alcohol_proof

    Fifty percent alcohol by volume was defined as 100 proof. [4] Note that this is different from 50% volume fraction (expressed as a percentage); the latter does not take into account change in volume on mixing, whereas the former does. To make 50% ABV from pure alcohol, one would take 50 parts of alcohol and dilute to 100 parts of solution with ...

  6. Abundance of elements in Earth's crust - Wikipedia

    en.wikipedia.org/wiki/Abundance_of_elements_in...

    Abundance (atom fraction) of the chemical elements in Earth's upper continental crust as a function of atomic number; [5] siderophiles shown in yellow Graphs of abundance against atomic number can reveal patterns relating abundance to stellar nucleosynthesis and geochemistry.

  7. List of countries by trade-to-GDP ratio - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_trade...

    This is the list of countries by trade-to-GDP ratio, i.e. the sum of exports and imports of goods and services, divided by gross domestic product, expressed as a percentage, based on the data published by World Bank. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1.

  8. Reserve requirement - Wikipedia

    en.wikipedia.org/wiki/Reserve_requirement

    Reserve requirements are central bank regulations that set the minimum amount that a commercial bank must hold in liquid assets. This minimum amount, commonly referred to as the commercial bank's reserve, is generally determined by the central bank on the basis of a specified proportion of deposit liabilities of the bank.

  9. List of sovereign states by tax revenue to GDP ratio - Wikipedia

    en.wikipedia.org/wiki/List_of_sovereign_states...

    The tax percentage for each country listed in the source has been added to the chart. According to World Bank , "GDP at purchaser's prices is the sum of gross value added by all resident producers in the economy plus any product taxes and minus any subsidies not included in the value of the products.