Decimal the Roman numerals did, an intermediate base of 5. Notably, the polymath Archimedes (ca. 287–212 BC) invented a decimal positional system in his Sand Reckoner which was based on 10 and later led the German mathematician Carl Friedrich Gauss to lament what heights science would have already reached in his days if Archimedes had fully realized the potential of his ingenious discovery. The Hittites hieroglyphs (since 15th century BC), just like the Egyptian and early numerals in Greece, was strictly decimal. Some non-mathematical ancient texts like the Vedas dating back to 1900–1700 BCE make use of decimals and mathematical decimal
Repeating decimal divided by the one represented by "n" digits 9. For example, If the repeating decimal is as above, except that there are "k" (extra) digits 0 between the decimal point and the repeating "n"-digit block, then one can simply add "k" digits 0 after the "n" digits 9 of the denominator (and, as before, the fraction may subsequently be simplified). For example, Any repeating decimal not of the form described above can be written as a sum of a terminating decimal and a repeating decimal of one of the two above types (actually the first type suffices, but that could