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Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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declining by

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "declining by" is correct and usable in written English.
It can be used to indicate a decrease in quantity, value, or quality over a specific period or in relation to a specific factor. Example: "The company's profits have been declining by 10% each quarter for the past year."

✓ Grammatically correct

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

59 human-written examples

The Danish Girl, declining by 43%, is at £6.44m.

Officials had hoped to see the number of cases declining by now.

News & Media

The New York Times

South Korean airlines slumped, with Korean Air Lines declining by its daily limit of 14.95 percent.

News & Media

The New York Times

UK beer sales have been declining by between 2% and 4% for years.

Today, it hovers at around 3.4m, and is declining by 13% a decade.

Total industry sales were off 10.1percentt, with truck sales declining by 17.9percentt.

News & Media

The New York Times

Woman: "How are you Mr. Green?" Man: "Declining by the hour".

News & Media

The New York Times

But the 21st century has seen numbers declining by up to 7% a year.

Advancing shares outnumbered those declining by about 4 to 3 on the New York Stock Exchange.

News & Media

The New York Times

And the number of donors has dipped as well, declining by about 14percentt.

News & Media

The New York Times

Not counting exploitation, today's mature fields are declining by an average of 7-8% per year.

News & Media

The Economist
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Expert writing Tips

Best practice

When writing about declines, maintain a consistent tense. For example, if you start with "Sales declined by 10%", avoid shifting to "Sales are declining by 10%" without reason.

Common error

Avoid using "declining by" when you mean "declining to" which expresses refusal. "The company is declining by 10%" (correct) indicates a decrease, whereas "The company is declining to comment" (incorrect if you meant decrease) indicates a refusal to comment.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

87%

Authority and reliability

4.6/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "declining by" functions as a modifier indicating the extent of a reduction. As evidenced by Ludwig, it quantifies how much something is decreasing, typically expressed as a percentage or a numerical value. Ludwig AI validates its correct and consistent usage.

Expression frequency: Very common

Frequent in

News & Media

49%

Science

31%

Formal & Business

6%

Less common in

Wiki

5%

Encyclopedias

0%

Social Media

0%

Ludwig's WRAP-UP

In summary, "declining by" is a versatile phrase used to express a quantifiable decrease or reduction, as confirmed by Ludwig. Its correct usage involves using the preposition "by" followed by a numerical value or percentage. It’s most commonly found in news and media, as well as scientific contexts, maintaining a neutral and professional register. Common errors include confusing it with "declining to". Ludwig AI reinforces the grammatical correctness and wide applicability of this phrase across diverse sources.

FAQs

How can I use "declining by" in a sentence?

Use "declining by" to show a specific reduction or decrease. For example, "Profits are declining by 5% this quarter", or "The population is "declining by" 2% annually".

What are some alternatives to the phrase "declining by"?

Is it correct to say "declining of" instead of "declining by"?

No, the correct preposition to use with "declining" in this context is "by". "Declining of" is grammatically incorrect when referring to a quantified decrease. You could say "a decline of", but when using the verb form use the preposition "by".

What's the difference between "declining by" and "declining from"?

"Declining by" indicates the amount of decrease (e.g., "Sales are declining by 10%"), whereas "declining from" indicates a previous level or standard (e.g., "Performance is declining from last year's high").

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Source & Trust

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Authority and reliability

4.6/5

Expert rating

Real-world application tested

Most frequent sentences: