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Hecto or hecta is a decimal unit prefix in the metric system denoting a factor of one hundred.It was adopted as a multiplier in 1795, and comes from the Greek á¼ÎºÎ±ÏÏÎ½ hekaton, meaning hundred.Based on a proposal by Thomas Young, the prefix was often alternatively spelled hecato-in early 19th century sources. Its unit symbol as an SI prefix in the International System of Units (SI) is the lower case letter h.t was adopted as a multiplier in 1795, and comes from the Greek á¼ÎºÎ±ÏÏÎ½ hekaton, meaning hundred. Based on a proposal by Thomas Young, the prefix was often alternatively spelled hecato-in early 19th century sources.
The most common metric prefixes are: Kilo- (1000 units) symbol: k- Hecto- (100 units) symbol: h- *Deka- (10 units) symbol: da- Deci- ( a tenth of a unit) symbol: d- Centi- ( â¦a hundredth of a unit) symbol: c- Milli- ( A thousandth of a unit) symbol: m- Micro- ( a millionth of a unit) symbol: Âµ- * Deka- may also be spelled, deca-.