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So, instead of 78/64 inch, or 1 14/64 inch, the size is noted as 1 7/32 inch. Below is a chart providing the decimal-fraction equivalents that are most relevant to fractional-inch drill bit sizes (that is, 0 to 1 by 64ths).
Metric ( SI) units. 25.4 mm. A fire hydrant marked as 3-inch. The inch (symbol: in or ″) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to 1 36 yard or 1 12 of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate similar units in ...
25.4 μm. A thousandth of an inch is a derived unit of length in a system of units using inches. Equal to of an inch, a thousandth is commonly called a thou / ˈθaʊ / (used for both singular and plural) or, particularly in North America, a mil (plural mils ). The words are shortened forms of the English and Latin words for "thousand" ( mille ...
Rounding to a specified multiple. The most common type of rounding is to round to an integer; or, more generally, to an integer multiple of some increment – such as rounding to whole tenths of seconds, hundredths of a dollar, to whole multiples of 1/2 or 1/8 inch, to whole dozens or thousands, etc.
In the 2nd century CE, Ptolemy used the value 377 ⁄ 120, the first known approximation accurate to three decimal places (accuracy 2·10 −5). It is equal to 3 + 8 / 60 + 30 / 60 2 , {\displaystyle 3+8/60+30/60^{2},} which is accurate to two sexagesimal digits.
Floating-point formats. In computing, decimal64 is a decimal floating-point computer numbering format that occupies 8 bytes (64 bits) in computer memory. It is intended for applications where it is necessary to emulate decimal rounding exactly, such as financial and tax computations. 384.
6d. £0.025. 1547–1970; circulated from 1971 to 1980 with a value of two and a half decimal pence. Also called "tanner", sometimes "tilbury", [4] or "joey" after the groat was no longer in circulation. [citation needed] Shilling. 1/-. £0.05. 1502–1970, circulated from 1971 to 1990 with a value of five decimal pence.
v. t. e. Decimal Day ( Irish: Lá Deachúil) [1] in the United Kingdom and in Ireland was Monday 15 February 1971, the day on which each country decimalised its respective £sd currency of pounds, shillings, and pence . Before this date, the British pound sterling (symbol "£") was subdivided into 20 shillings, each of 12 (old) pence, a total ...