decimal fraction

noun

Definition of decimal fraction 

: a fraction (such as .25 = ²⁵/₁₀₀ or .025 = ²⁵/₁₀₀₀) or mixed number (such as 3.025 = 3²⁵/₁₀₀₀) in which the denominator is a power of 10 usually expressed by use of the decimal point

First Known Use of decimal fraction

1660, in the meaning defined above

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The first known use of decimal fraction was in 1660

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