one-fifth
Definition
Noun: - One part in five equal parts: A single portion resulting from the division of a whole into five equal parts; equivalent to 1/5 or 20%.
Usage
This word is used to specify a precise fractional amount of something. It functions as a quantifier. - It is often used in statistical, mathematical, or descriptive contexts to indicate proportion. - It can be preceded by articles like "a" or "one" (e.g., a one-fifth).
Examples
Advanced Usage
- "by a factor of one-fifth": indicating a reduction to 20% of the original amount.
- The new process reduced waste by a factor of one-fifth.
- Used in formal or technical writing to express ratios and percentages clearly.
Variants and Related Words
- Fifth (noun): Can be synonymous with "one-fifth" (e.g., ). Also refers to the ordinal number (5th) or a musical interval.
- 20 percent: The equivalent percentage.
- Fraction: The general class to which this word belongs.
Synonyms
- Twenty percent
- A fifth
Notes
- "One-fifth" is a specific term. Do not confuse it with the ordinal number "fifth" (5th), which indicates position in a sequence.
- It is typically written with a hyphen when used as a noun phrase modifier before another noun (e.g., ).
Noun
-
one part in five equal parts
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