The phrase "a constant proportion" is correct and usable in written English.
It can be used in contexts involving ratios, mathematics, or discussions about relationships between quantities that remain unchanged.
Example: "In this experiment, we maintained a constant proportion of the reactants to ensure consistent results."
Alternatives: "a fixed ratio" or "an unchanging fraction".
The demise of this deal — known as a constant proportion debt obligation is emblematic of what is happening to the financial system in the credit collapse of 2007.
This method does not require a constant rate of sedimentation of ionium but simply that the two isotopes are precipitated in a constant proportion.
Adjusted Ebitda remained at a constant proportion of revenues: $160 million, or 25% of revenue, versus $117 million for Q1 2014, also 25% of revenue.
This implies that the forward propagating waves in term of power flow and frequency remain in a constant proportion.
Europe, the most central (as measured by weighted eigenvector centrality), showed a constant proportion of bandwidth directed within the continent over the period.
The main drawback of this methodology now, is that the pushover curve is drawn on the basis that the element stiffnesses are assumed strength independent, equal to a constant proportion of the gross section stiffness, regardless of the reinforcement content.
So far I have assumed that government spending represents a constant proportion of GDP and that it is neither productive nor enters households' preferences: two assumptions often made in model economies focusing on taxation issues.
A specification including income in logs, for instance, assumes not only decreasing returns to income in terms of welfare but also that the cost of disability is a constant proportion of income.
Rumen fermentation parameters and fractional passages (solid and liquid) rates support the reduction in dC, N retention, and microbial protein synthesis observed as more dietary fiber is added to the rations of dairy heifers precision-fed a constant proportion of rumen-degradable protein.
The experimental design was based on the addition of prelabelled epipelic microalgae to microcosms in a constant proportion with unlabelled diatoms, and in such a way that algal food availability was not a limiting factor within the range of tested densities (0.3 to 4.1 snails cm−2).
This device allows minimally invasive real-time CO monitoring by measuring aortic blood flow velocity at the descending thoracic aorta, assuming a constant aortic diameter (obtained from a nomogram based on the patient's age, weight and height) and that a constant proportion of the CO flows through the descending aorta [31].
