What decimal value does "deci" represent?

The prefix "deci" denotes a value of one-tenth, which can be expressed as 1/10 in fractional form. In the metric system, it is commonly used to represent a reduction of a unit by a factor of ten. For instance, 1 decimeter equals 0.1 meters. Understanding this fundamental metric prefix helps in converting measurements and comprehending the scale of values within the metric system. The other options represent prefixes for centi, which corresponds to 1/100; milli, which corresponds to 1/1000; and micro, which corresponds to 1/10000, each indicating progressively smaller fractions, but they do not apply to the prefix "deci".