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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
one-third of them
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "one-third of them" is correct and usable in written English.
You can use it when referring to a specific portion or fraction of a group or quantity. Example: "After the survey, we found that one-third of them preferred option A over option B."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(6)
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
40 human-written examples
One-third of them are expected to die on the waiting list.
News & Media
One-third of them described their success as certain.
Academia
Nearly one-third of them are overweight or obese.
News & Media
Only one-third of them had registered to vote.
News & Media
Approximately one-third of them are over age 50.
News & Media
Suzlon has built about one-third of them.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
20 human-written examples
One third of them had a growth rate of ≥ 2 SDS on GH treatment.
Science
One third of them suspect that they have been already been infiltrated.
News & Media
More than one third of them were in Anne Arundel County.
News & Media
Pronunciations for around one third of them were obtained from CMUdict.
Although nearly all rural households used leaves and twigs as a fuel, only one third of them preferred this fuel.
Expert writing Tips
Best practice
Use "one-third of them" when you want to be specific about the proportion, ensuring clarity and precision in your writing. It is suitable for both formal and informal contexts.
Common error
Avoid mixing fraction representations within the same context. For example, if you've already established using percentages, stick with percentages instead of switching to "one-third of them" mid-paragraph. Consistency improves readability.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "one-third of them" functions as a quantitative expression. Ludwig shows it specifies a fraction of a previously mentioned group, indicating that roughly 33.3% of that group possesses a certain attribute or is involved in a specific action.
Frequent in
News & Media
57%
Science
35%
Formal & Business
8%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "one-third of them" is a grammatically correct and commonly used expression to denote a proportion within a group. As Ludwig confirms, it functions as a quantitative descriptor, conveying that approximately 33.3% of a specified group shares a particular characteristic. It's versatile, fitting comfortably in news, scientific articles, and business communications. To maintain consistency, avoid interchanging fraction representations mid-text. For slight variations in tone or emphasis, alternatives include "a third of them" or "one in three of them".
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
a third of them
Omits the "one-" prefix, making it slightly less formal.
33 percent of them
Expresses the fraction as a percentage, providing a more precise numerical value.
approximately one-third of them
Adds a qualifier to indicate an estimate rather than an exact fraction.
roughly a third of them
Similar to 'approximately', but uses 'roughly' for a more casual tone.
one in three of them
Rephrases the fraction in terms of individual odds within the group.
a portion of them
Uses a more general term to indicate a part of the group without specifying the exact fraction.
some of them
Even more general, indicating that at least a few members of the group are being referenced.
part of them
Similar to "some of them" but implies a smaller amount.
a fraction of them
Highlights that a unspecified fraction of the group/quantity is being considered.
a minority of them
Implying that the proportion is less than half, without specifying the exact amount.
FAQs
How do I use "one-third of them" in a sentence?
Use "one-third of them" to specify that a particular attribute or action applies to approximately 33.3% of a defined group. Example: "Among the applicants, "one-third of them" had prior experience."
What can I say instead of "one-third of them"?
Alternatives include "a third of them", "33 percent of them", or "approximately one-third of them" depending on the desired level of precision.
Is it grammatically correct to say "one-third of them is"?
No, it should be "one-third of them are" because "them" is plural. The verb should agree with the plural pronoun.
What's the difference between "one-third of them" and "one in three of them"?
"One-third of them" refers to a proportion of a group, while "one in three of them" emphasizes individual odds within that group. They are often interchangeable, but the nuance differs slightly.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested