a portion of which

USAGE SUMMARY

The phrase "a portion of which" is correct and usable in written English.
It can be used to refer to a specific part of something larger, often in formal or academic writing. Example: "The report includes several case studies, a portion of which highlights the impact of climate change on local ecosystems."

✓ Grammatically correct

News & Media

Science

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

57 human-written examples

Based on that traffic, the organizers secure advertising sponsorships from corporate partners, a portion of which goes to charities.

The New York Times

The house is reached via a half-mile driveway, a portion of which is made of crushed clamshells.

The New York Times

While the government is closed, it cannot collect fines and fees, only a portion of which are later recouped.

The New York Times

This is a piece of copper foil 20cm square that has 696 rings, a portion of which is reproduced above.

The Economist

The advocacy group has put together a table showing what's happening in each state, a portion of which is below.

The New York Times

Citigroup will also offer public investors about $2 billion of newly issued debt securities, a portion of which will be convertible into stock.

The New York Times

Rivera signed a three-year, $45 million contract in the off-season, a portion of which was seen as a payment for services already rendered.

The New York Times - Sports

The city contributed $100 million last year, a portion of which was used to speed up the designs for the new boilers.

The New York Times

But the restrictions were stiff: There would be a new Lehman Wing, a portion of which reproduced rooms from the Lehman home.

The New York Times - Arts

The work, Mr. Charlton-Jonesaidis, is part of a small tabernacle, a portion of which is in the Frick Collection.

The New York Times - Arts

Human-verified similar examples from authoritative sources

Similar Expressions

1 human-written examples

Instead, the agencies get meager increases--a portion of which is eaten up by projects earmarked by legislators for their constituents--or across-the-board cuts.

Science Magazine

Expert writing Tips

Best practice

Use "a portion of which" to clearly indicate that you're referring to a specific part of a larger entity, especially when precision isn't critical but the existence of a part is relevant.

Common error

Avoid using "a portion of which" in casual conversations or informal writing. Simpler alternatives like "some of which" or "part of it" often sound more natural and less stilted.

Linguistic Context

The phrase "a portion of which" functions as a relative clause that modifies a preceding noun phrase. It indicates that the following information pertains to a part or share of that noun. As confirmed by Ludwig AI, this is a grammatically correct and usable structure.

Expression frequency: Very common

Frequent in

News & Media

70%

Science

15%

Formal & Business

10%

Less common in

Encyclopedias

1%

Wiki

2%

Social Media

2%

Ludwig's WRAP-UP

In summary, "a portion of which" is a grammatically sound and widely used phrase, predominantly found in formal contexts like news articles, scientific publications, and business documents. As Ludwig AI confirms, it serves to specify that subsequent information relates only to a part of a previously mentioned entity. While useful for precise communication, it should be used judiciously in informal settings where simpler alternatives may be more appropriate. This phrase conveys specificity and formality.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

a part of which

Replaces "portion" with "part", a more common and slightly less formal synonym.

part of which

A shortened version of "a part of which", maintaining similar meaning.

a fraction of which

Replaces "portion" with "fraction", emphasizing that the part is small relative to the whole.

a percentage of which

Specifies the "portion" as a percentage, adding a quantitative aspect.

a segment of which

Substitutes "portion" with "segment", suggesting a distinct section or division.

a share of which

Implies that the "portion" is a divided allotment, emphasizing distribution.

some of which

Uses "some" to indicate an unspecified quantity, making it less precise.

a slice of which

Uses "slice" to suggest a literal or figurative piece, implying a cutting or division.

a quantity of which

Replaces "portion" with "quantity", focusing on the amount or number.

a certain amount of which

Emphasizes that the amount is not precisely defined but is noticeable or significant.

FAQs

How can I use "a portion of which" in a sentence?

Use "a portion of which" to refer back to a previously mentioned noun. For example: "The company's assets are substantial, "a portion of which" is held in overseas accounts."

What are some alternatives to "a portion of which"?

Depending on the context, you can use phrases like "some of which", "part of which", or "a percentage of which".

When is it appropriate to use "a portion of which"?

It's appropriate in formal writing or when you need to clearly indicate that you are referring to a specific part of something larger. It adds a level of precision that might be missing with simpler alternatives.

What's the difference between "a portion of which" and "some of which"?

"A portion of which" is generally more formal and specific than "some of which". The former implies a more deliberate selection or allocation, while the latter is more general.