increase by 2 fold

USAGE SUMMARY

The phrase "increase by 2 fold" is not correct in standard English; the correct expression is "increase twofold." You can use it when describing a situation where something has doubled in quantity or size.
Example: "The company's profits increased twofold over the last year."

⚠ May contain grammatical issues

Science

Human-verified examples from authoritative sources

Exact Expressions

1 human-written examples

No marked changes in Si concentrations were seen in the non-connective tissues, apart from the liver where it appeared to marginally increase by 2 fold with age (F = 130, p < 0.0001, regression analysis), albeit overall levels are low (< 0.5 μg/g; Fig. 2), compared to connective tissues.

Bone

Human-verified similar examples from authoritative sources

Similar Expressions

59 human-written examples

In awd mutant cells, the level of Notch-Avl colocalization increased by 2 fold.

BMC Biology

Cleaved caspase-3 levels increased by 2.1 fold in cells treated with Apo-bLf and slight increase by 1.3 fold in cells treated with Fe-bLf.

BMC Cancer

In control conditions, diatom cell density showed an increase by 1.5 fold after 24 h.

BMC Genomics

For example, following 30 minutes of aerobic exercise, AREG was shown to increase by 3.4 fold [ 23].

BMC Sports Science, Medicine and Rehabilitation

In contrast, in astrocytes, miR-29b showed a trend of upregulation later, after 6 h and a significant level increase by 2-fold only after 12 h.

Plosone

NT-proBNP levels, on the other hand, increase by 2-fold within the first 28 hours after delivery suggesting a role in postpartum diuresis [ 26].

BMC Endocrine Disorders

If this rule were applied, 1 of the reference H5N1 subtype viruses (clade 1), possessing N295S (23 ), would increase by ≈2-fold in oseltamivir IC50 values (2.99 nmol/L) compared with values of clade 2.3.4 viruses (1.62 nmol/L) and, thus, would be reported as exhibiting normal inhibition.

Emerging Infectious Diseases

Luciferase expression from the Crh− 120 mutant promoter resulted in a 27-fold increase in luciferase activity when compared with the empty pGL4 luciferase vector and a significant increase, by 2-fold in relative luciferase activity, when compared with the WT Crh promoter, thereby demonstrating that the mutation causes an increase in basal gene transcription.

Endocrinology

As a result, allowable pollution levels may increase by 10-fold.

Environmental Health Perspectives

H3K27Ac was similarly increased by 2.6 fold (P < 0.01) after treatment with -JQ1 (Fig. 8).

Nature

Expert writing Tips

Best practice

Use the phrase "increase twofold" or simply "double" to convey the meaning of something increasing by a factor of two. This ensures grammatical correctness and clarity in your writing.

Common error

Avoid saying "increase by X fold". The correct way to express a multiplication in increase is to say "increase X-fold" or use "to increase X times". Saying "increase by X fold" implies an addition, not a multiplication. For example, it is better to use alternatives like "double", "triple", "increase twofold" instead of "increase by 1 fold", "increase by 2 fold".

Linguistic Context

The phrase "increase by 2 fold" functions as a prepositional phrase attempting to describe the extent of an increase. However, it is grammatically incorrect, as highlighted by Ludwig. The correct form would involve using an adverbial modifier to properly denote multiplication.

Expression frequency: Uncommon

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

0%

Ludwig's WRAP-UP

In summary, while the phrase "increase by 2 fold" is used to express a doubling, Ludwig AI flags it as grammatically incorrect. The proper way to express this is to use "increase twofold" or, more simply, "double". Although examples are found in scientific literature, adhering to correct grammar enhances clarity and professionalism. Related phrases like "grow by 100 percent" offer alternative ways to convey the same meaning. Remember to avoid the common error of using "increase by X fold" when you mean to indicate multiplication; instead, use "increase X-fold" or "increase to X times the amount".

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

double

Replaces the phrase with a single, concise verb.

increase twofold

Uses the correct adverbial form to indicate a doubling.

grow by 100 percent

Expresses the increase as a percentage.

increase to twice the amount

Clarifies that the final quantity is twice the initial amount.

expand by a factor of two

Uses a mathematical term to describe the multiplicative increase.

rise by a power of two

Similar to 'factor,' but emphasizes the exponential nature.

become twice as large

Focuses on the resulting size in comparison to the original.

see a 100% gain

Highlights the positive change in terms of gain.

experience a doubling

Nominalizes the increase, making it the subject of the sentence.

amplify to double its previous state

Implies an amplification process leading to a doubled state.

FAQs

What's the correct way to say something has doubled?

Instead of saying "increase by 2 fold", it's more accurate to say "increase twofold" or simply "double".

Is it grammatically correct to say "increase by X fold"?

No, the phrase "increase by X fold" is generally considered grammatically incorrect. A better alternative is to express the increase as "X-fold" or use "to increase X times".

How can I express a percentage increase of 100%?

A 100% increase can be expressed as "grow by 100 percent", "double", or "increase to twice the amount".

What does it mean to "expand by a factor of two"?

To "expand by a factor of two" means to double in size or quantity. It's a mathematical way of expressing a twofold increase.