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  2. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    An increase of $0.15 on a price of $2.50 is an increase by a fraction of ⁠ 0.15 / 2.50 ⁠ = 0.06. Expressed as a percentage, this is a 6% increase. While many percentage values are between 0 and 100, there is no mathematical restriction and percentages may take on other values. [4]

  3. Rate of return - Wikipedia

    en.wikipedia.org/wiki/Rate_of_return

    If the return in 2015 was 10% in Singapore dollars, and the Singapore dollar rose by 5% against the US dollar over 2015, then so long as there were no flows in 2015, the return over 2015 in US dollars is: 1.1 x 1.05 − 1 = 15.5%. The return between the beginning of 2015 and the end of January 2016 in US dollars is: 1.155 x 1.07 − 1 = 23.585%

  4. List of countries by tax rates - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_tax_rates

    Map of the world showing national-level sales tax / VAT rates as of October 2019. A comparison of tax rates by countries is difficult and somewhat subjective, as tax laws in most countries are extremely complex and the tax burden falls differently on different groups in each country and sub-national unit.

  5. Present value - Wikipedia

    en.wikipedia.org/wiki/Present_value

    Here, 'worth more' means that its value is greater than tomorrow. A dollar today is worth more than a dollar tomorrow because the dollar can be invested and earn a day's worth of interest, making the total accumulate to a value more than a dollar by tomorrow. Interest can be compared to rent. [2]

  6. Compound interest - Wikipedia

    en.wikipedia.org/wiki/Compound_interest

    It gives the interest on 100 lire, for rates from 1% to 8%, for up to 20 years. [3] The Summa de arithmetica of Luca Pacioli (1494) gives the Rule of 72 , stating that to find the number of years for an investment at compound interest to double, one should divide the interest rate into 72.

  7. List of regions by past GDP (PPP) - Wikipedia

    en.wikipedia.org/wiki/List_of_regions_by_past...

    The empire's largest economy in 1870 was British India with a 12.15% share of world GDP, followed by the United Kingdom with a 9.03% share. The empire's largest economy in 1913 was the United Kingdom with an 8.22% share of world GDP, followed by British India with a 7.47% share. [20]

  8. Baker percentage - Wikipedia

    en.wikipedia.org/wiki/Baker_percentage

    An ingredient's mass is obtained by multiplying the formula mass by that ingredient's true percentage; because an ingredient's true percentage is that ingredient's baker's percentage divided by the formula percentage expressed as parts per hundred, an ingredient's mass can also be obtained by multiplying the formula mass by the ingredient's ...

  9. Inflation - Wikipedia

    en.wikipedia.org/wiki/Inflation

    The formula for calculating the annual percentage rate inflation in the CPI over the course of the year is: () % = % The resulting inflation rate for the CPI in this one-year period is 4.28%, meaning the general level of prices for typical U.S. consumers rose by approximately four percent in 2007.