The phrase "a decreasing ratio" is correct and usable in written English.
It can be used when describing a situation where one quantity is diminishing in relation to another quantity over time or in a specific context.
Example: "The study revealed a decreasing ratio of students passing the exam compared to previous years."
Alternatives: "a declining ratio" or "a diminishing ratio".
In agreement with other authors, we found an increased friction with a decreasing ratio of classifying and fluidized particles.
Examination into the specific GAGs in Phase II samples revealed a decreasing ratio of CS-6 to CS-4 over time (Fig. 3).
A decreasing ratio of maximum to mean life span in longer lived mammals clearly suggests a positive relationship between the fitness effects of senescence and life span among mammals.
In vitro results showed (Fig. 2(b)) that at a constant [PpIX] and in the case of a decreasing ratio 620/634, [PpIX 634]η 634 increases very steeply while [PpIX 620]η 620 is rather stable.
However, a decreasing ratio of pore surface area to volume (which for a sphere, simplifies to 6 divided by the diameter) is in this case associated with an increase in pore diameter.
They are tend to find parsimonious (low-diversity) solutions in all population sizes, with a decreasing ratio of "total number of distinct haplotypes explaining the given set of individuals" to "total number of given individuals" as the population size grows.
A decrease ratio for the nerve blood flow was calculated for each case according to the following formula: decrease ratio = (a b)/a × 100, where a = blood flow before osteotomy and b = blood flow after osteotomy.
Use of a decreased ratio of cardiac index to oxygen extraction (CI/EO2 ratio) may be better, because this parameter also reflects the cardiac response to anemia [83].
Pipeline gas injection scenario is associated with a decreased ratio of produced gas to condensate (compared to that in pure methane injection scenario).
Results: The whiplash group showed a decreased ratio between the lower versus upper cervical spine but comparisons between groups were not statistically significant.
We suggest that a decreased ratio of ionic to activated neutral species flux to the substrate during deposition is responsible for the increased hydrogen incorporation.
