Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
reduced by one
Grammar usage guide and real-world examplesUSAGE SUMMARY
"reduced by one" is correct and usable in written English.
You can use this phrase when referring to a change in quantity or amount. For example, "The number of people in the room was reduced by one."
✓ Grammatically correct
News & Media
Science
Academia
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
37 human-written examples
The Pata Honda rider broke clear on lap seven of a race that was reduced by one lap to 17 due to heavy rainfall.
News & Media
On average the number of non-responders was reduced by one third.
For most operations, the complexity is reduced by one order.
Army officials had previously said the timeline would be reduced by one year, to 2011.
News & Media
We will accept late assignments, but the grades will be reduced by one letter grade (if submitted within one week).
Render a second image of the scene using the double gauss lens with the aperature radius reduced by one half.
Academia
Human-verified similar examples from authoritative sources
Similar Expressions
23 human-written examples
Emptying trash from baskets on street corners would be reduced by one-third, and extra garbage collection in schools would be eliminated.
News & Media
Cook until cream is reduced by one-third.
News & Media
The papal court at Avignon was reduced by one-fourth.
Encyclopedias
Business coverage ranked next, reduced by one-third of the papers.
News & Media
3. Heat cream in a medium saucepan over low heat, until reduced by one-fourth.
News & Media
Expert writing Tips
Best practice
Use "reduced by one" when you want to clearly and directly indicate a decrement of a single unit from a quantity.
Common error
Avoid using "reduced by one" when a more nuanced description of the reduction is necessary. For instance, saying something is simply "smaller" or "less" might be more appropriate if the precise amount of reduction is not critical.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "reduced by one" functions as a descriptive term, indicating a quantitative decrease. It modifies a noun or pronoun, specifying that its value has been lessened by a single unit. Ludwig AI indicates that it is correct and usable in written English.
Frequent in
Science
35%
News & Media
35%
Academia
12%
Less common in
Wiki
4%
Encyclopedias
2%
Formal & Business
2%
Ludwig's WRAP-UP
The phrase "reduced by one" is a grammatically sound and frequently used expression to indicate a decrease of a single unit. Analysis shows its prevalence across diverse fields like Science, News & Media, and Academia. Ludwig AI confirms its correctness and usability. When writing, use it to convey an exact numerical reduction. Alternatives like "decreased by one" or "diminished by one" can be employed for variety, but ensure the context calls for precision. The phrase's neutral register makes it suitable for both formal and informal communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
decreased by one
Replaces "reduced" with a direct synonym, maintaining the same meaning.
diminished by one
Uses a more formal synonym for "reduced", suggesting a slight lessening.
lessened by one
Offers another synonym for "reduced", indicating a decrease in amount.
lowered by one
Implies a reduction in a measured or graded scale.
shortened by one
Focuses on the reduction of length or duration.
one less
Simplifies the phrase to a more concise expression of reduction.
subtracted by one
Emphasizes the mathematical operation of reducing by one.
decremented by one
Uses a technical term, often in computing, for reducing by one.
taken away by one
Expresses the removal of one unit from a total.
contracted by one
Suggests a reduction in size or scope by one.
FAQs
How can I use "reduced by one" in a sentence?
You can use "reduced by one" to indicate a decrease of one unit, as in "The team size was "reduced by one" member after the resignation".
What are some alternatives to "reduced by one"?
Alternatives include "decreased by one", "diminished by one", or simply stating "one less" depending on the context.
Is it grammatically correct to say "reduced by one"?
Yes, "reduced by one" is grammatically correct and commonly used to describe a decrease in quantity.
What's the difference between "reduced by one" and "reduced by a third"?
"Reduced by one" indicates a decrease of a single unit, while "reduced by a third" indicates a proportional decrease. The former is absolute, the latter is relative.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested