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  2. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    To calculate a percentage of a percentage, convert both percentages to fractions of 100, or to decimals, and multiply them. For example, 50% of 40% is: ⁠ 50 / 100 ⁠ × ⁠ 40 / 100 ⁠ = 0.50 × 0.40 = 0.20 = ⁠ 20 / 100 ⁠ = 20%. It is not correct to divide by 100 and use the percent sign at the same time; it would literally imply ...

  3. Grade (slope) - Wikipedia

    en.wikipedia.org/wiki/Grade_(slope)

    A larger number indicates higher or steeper degree of "tilt". Often slope is calculated as a ratio of "rise" to "run", or as a fraction ("rise over run") in which run is the horizontal distance (not the distance along the slope) and rise is the vertical distance.

  4. Jewish population by country - Wikipedia

    en.wikipedia.org/wiki/Jewish_population_by_country

    However, he revised the United States Jewish number to 5.7 million in subsequent years. [ 28 ] [ 27 ] This controversy followed a similar debate in 2001 when the National Jewish Population Survey released a United States Jewish estimate as low as 5.2 million only to have serious methodological errors suggested in their survey. [ 27 ]

  5. Jews - Wikipedia

    en.wikipedia.org/wiki/Jews

    The number of Jews in Russia varies widely according to whether a source uses census data (which requires a person to choose a single nationality among choices that include "Russian" and "Jewish") or eligibility for immigration to Israel (which requires that a person have one or more Jewish grandparents).

  6. Carbon - Wikipedia

    en.wikipedia.org/wiki/Carbon

    The purple numbers indicate how much carbon moves between reservoirs each year. The sediments, as defined in this diagram, do not include the ≈70 million GtC of carbonate rock and kerogen. Under terrestrial conditions, conversion of one element to another is very rare. Therefore, the amount of carbon on Earth is effectively constant.

  7. List of countries by carbon dioxide emissions - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    List of countries by carbon emissions Location % of global total Fossil emissions (1,000,000 tons per year) % change from 2000 2023 2000 World 100%: 39,023.94

  8. Population growth - Wikipedia

    en.wikipedia.org/wiki/Population_growth

    Population growth is the increase in the number of people in a population or dispersed group. The global population has grown from 1 billion in 1800 to 8.2 billion in 2025. [ 3 ] Actual global human population growth amounts to around 70 million annually, or 0.85% per year.

  9. List of religious populations - Wikipedia

    en.wikipedia.org/wiki/List_of_religious_populations

    The list of religious populations article provides a comprehensive overview of the distribution and size of religious groups around the world. This article aims to present statistical information on the number of adherents to various religions, including major faiths such as Christianity, Islam, Hinduism, Buddhism, and others, as well as smaller religious communities.