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  2. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    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 division by 10,000. For example, 25% = 25 / 100 = 0.25 , not 25% / 100 , which actually is 25 ⁄ 100 / 100 = 0.0025 .

  3. Pascal's calculator - Wikipedia

    en.wikipedia.org/wiki/Pascal's_calculator

    Pascal's calculator (also known as the arithmetic machine or Pascaline) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen. [2] He designed the machine to add and subtract two numbers ...

  4. Sensitivity and specificity - Wikipedia

    en.wikipedia.org/wiki/Sensitivity_and_specificity

    Sensitivity (true positive rate) is the probability of a positive test result, conditioned on the individual truly being positive. Specificity (true negative rate) is the probability of a negative test result, conditioned on the individual truly being negative. If the true status of the condition cannot be known, sensitivity and specificity can ...

  5. Percentage point - Wikipedia

    en.wikipedia.org/wiki/Percentage_point

    For example, moving up from 40 percent to 44 percent is an increase of 4 percentage points (although it is a 10-percent increase in the quantity being measured, if the total amount remains the same). In written text, the unit (the percentage point) is usually either written out, [2] or abbreviated as pp , p.p. , or %pt. to avoid confusion with ...

  6. REI Is Offering Up to 50% Off Editor-Fave Hoka and New ... - AOL

    www.aol.com/rei-offering-50-off-editor-164400900...

    There are three versions of the Bondi 7 on sale at REI—one, a teal and red men’s shoe in size 14 for 50 percent off; another, a gray and white men’s shoe in size 10 wide for 50 percent off ...

  7. IC50 - Wikipedia

    en.wikipedia.org/wiki/IC50

    Half maximal inhibitory concentration ( IC50) is a measure of the potency of a substance in inhibiting a specific biological or biochemical function. IC 50 is a quantitative measure that indicates how much of a particular inhibitory substance (e.g. drug) is needed to inhibit, in vitro, a given biological process or biological component by 50%. [1]

  8. Margin (finance) - Wikipedia

    en.wikipedia.org/wiki/Margin_(finance)

    The typical peak rates on brokers' loans were 40–50 percent. Brokerage houses followed suit and demanded higher margin from investors". For example, Jane buys a share in a company for $100 using $20 of her own money and $80 borrowed from her broker.

  9. Mortgage calculator - Wikipedia

    en.wikipedia.org/wiki/Mortgage_calculator

    Mortgage calculation capabilities can be found on financial handheld calculators such as the HP-12C or Texas Instruments TI BA II Plus. There are also multiple free online free mortgage calculators, and software programs offering financial and mortgage calculations.

  10. Pickett's Charge - Wikipedia

    en.wikipedia.org/wiki/Pickett's_Charge

    Pickett's Charge (July 3, 1863), also known as the Pickett–Pettigrew–Trimble Charge, was an infantry assault ordered by Confederate General Robert E. Lee against Major General George G. Meade 's Union positions on the last day of the Battle of Gettysburg in Pennsylvania during the Civil War. Confederate troops made a frontal assault toward ...

  11. 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.