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Fraction (mathematics) - Wikipedia, the free encyclopedia
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Fraction (mathematics)
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A cake with one quarter removed. The remaining three quarters are shown.
Fractions (from

Latin:

fractus, "broken") are

numbers expressed as the

ratio of two numbers, and are used primarily to express a comparison between parts and a whole.
The earliest fractions were A much later development were the common or "vulgar" fractions, still used today (1?2, 5?8, 3?4, etc.), which consist of a numerator and a denominator?the numerator representing a number of equal parts and the denominator telling how many of those parts make up a whole. An example is 3?4, in which the numerator, 3, tells us that the fraction represents 3 equal parts, and the denominator, 4, tells us that 4 parts make up a whole.
A still later development was the decimal fraction, now called simply a

decimal, in which the denominator is a

power of ten, determined by the number of

digits to the right of a

decimal separator, the appearance of which (e.g., a period, a raised period (?), a comma) depends on the locale (for examples, see

decimal separator). Thus for 0.75 the numer...

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