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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
by how much do they differ
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "by how much do they differ" is correct and usable in written English.
It can be used when asking for the extent or degree of difference between two or more items, concepts, or values. Example: "In the study, we need to analyze the results and determine by how much do they differ from the previous findings."
✓ Grammatically correct
Science
News & Media
Formal & Business
Alternative expressions(1)
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
1 human-written examples
If so then it is interesting to check if current charges are close to the optimal one, and if not then why and by how much do they differ?
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
How much do they help?
This unfortunately still leaves unanswered the question: by how much do administration costs differ between biologics given intravenously, subcutaneously or intramuscularly?
Science
How much did they fall by?
News & Media
By how much does it vary?
How do they differ?
News & Media
So how do they differ?
News & Media
Really, how do they differ from catalogues?
News & Media
How do they differ from mainstream schools?
News & Media
How do they differ from standard tours?
News & Media
How do they differ from Millennials?
News & Media
Expert writing Tips
Best practice
When using the phrase "by how much do they differ", ensure you clearly define the entities being compared and the units of measurement for the difference. This provides context and clarity for the reader.
Common error
Avoid using "by how much do they differ" without specifying what aspect is being compared. For instance, instead of saying "the two products differ", clarify with "by how much do their prices differ?"
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "by how much do they differ" functions as an interrogative phrase used to solicit information regarding the magnitude or extent of the difference between two or more entities. As seen in Ludwig, this phrase seeks to quantify the variance. Ludwig AI affirms the grammatical correctness of the phrase.
Frequent in
Science
30%
News & Media
30%
Formal & Business
20%
Less common in
Academia
10%
Wiki
5%
Encyclopedias
5%
Ludwig's WRAP-UP
The phrase "by how much do they differ" serves to request the degree of difference between two or more subjects. According to Ludwig, this phrase is grammatically correct and can be used effectively in writing. It's most commonly found in scientific, news-related and professional contexts and aims to quantify the variance between the subjects of comparison. When using this phrase, ensure that the items being compared and the measurement units are well-defined to provide clarity. Alternatives include "what is the magnitude of their difference" or simply "how do they differ".
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
what is the magnitude of their difference
Focuses on the size or extent of the difference.
how significant is the disparity between them
Emphasizes the importance or noteworthiness of the difference.
to what extent do they vary
Highlights the degree of variation that exists.
what is the degree of divergence between them
Stresses the point at which they begin to move apart.
how widely do they diverge
Focuses on the extent of separation or deviation.
what is the quantitative difference
Highlights the numerical difference between them.
how does their value spread
Focuses on difference on the value.
what is the extent of their deviation
Focuses on the amount of their deviation.
how do they compare numerically
Focuses on a direct numerical comparison.
how much do they contrast
Highlights the level of contrast between them.
FAQs
How can I rephrase "by how much do they differ" to sound more formal?
In formal contexts, you could use phrases like "to what extent do they vary?", "what is the magnitude of their difference?", or "how significant is the disparity between them?" These alternatives offer a more sophisticated tone.
What's a simpler way to ask "by how much do they differ"?
For simpler alternatives, consider "what is the difference?" or "how much do they vary?" These options are more direct and easier to understand.
Is it always necessary to quantify the difference when using "by how much do they differ"?
While not always mandatory, quantifying the difference provides valuable context and clarity. If precision isn't crucial, focus on highlighting the key distinctions instead. You could also use the phrase "how do they differ".
Which is more appropriate, "by how much do they differ" or "how are they different"?
While both are grammatically sound, "by how much do they differ" is used to emphasize the quantitative aspect of the difference, while "how are they different" focuses on the qualitative aspects.
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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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested