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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. Multiplication table - Wikipedia

    en.wikipedia.org/wiki/Multiplication_table

    In mathematics, a multiplication table (sometimes, less formally, a times table) is a mathematical table used to define a multiplication operation for an algebraic system. The decimal multiplication table was traditionally taught as an essential part of elementary arithmetic around the world, as it lays the foundation for arithmetic operations ...

  4. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic (addition, subtraction, multiplication, division) and advanced (trigonometric, hyperbolic, etc.) mathematical operations and functions.

  5. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    The square of n (i.e., 100 ± a) is 100(100 ± 2a) + a 2. In other words, the square of a number is the square of its difference from 100 added to the product of one hundred and the difference of one hundred and the product of two and the difference of one hundred and the number. For example, to square 93: 100(100 − 2(7)) + 7 2 = 100 × 86 + 49

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  7. Windows Calculator - Wikipedia

    en.wikipedia.org/wiki/Windows_Calculator

    A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.

  8. Trump tariffs rattle Wall Street — here's what the movers and ...

    www.aol.com/finance/trump-tariffs-rattle-wall...

    The Trump administration levied tariffs of 25% on Canada and Mexico and 10% on China on Saturday, citing issues like fentanyl and illegal immigration. Duties on all three economic powerhouses will ...

  9. What is compound interest? How compounding works to turn time ...

    www.aol.com/finance/what-is-compound-interest...

    And the time to calculate the amount for one year is 1. A 🟰 $10,000(1 0.05/12)^12 ️1. ... Let’s say you have an initial investment of $10,000 at 25 years old. You don’t contribute ...