The phrase "a decreasing fraction of" is correct and usable in written English.
It can be used to describe a situation where a particular portion or percentage is diminishing over time or in relation to something else.
Example: "Over the years, a decreasing fraction of the population has chosen to pursue traditional careers."
Alternatives: "a shrinking portion of" or "a diminishing share of".
Hence, a decreasing fraction of sediment-laden ice downstream in the Transpolar Drift, may contribute - along with the general thinning of ice (Fig. 3c) to enhanced light availability and primary production39,41,42.
For a larger excess of B, however, reff becomes significantly smaller than r, indicating that a decreasing fraction of B particles is incorporated in the chains (less than 50% for r = 24).
It is shown that the activation of flaws occurs at tensile reflected pulses that are a decreasing fraction of the compressive pulse, as the powder strength increases.
It was also found that a decreasing fraction of H2S dissociated as the coverage of H2S increased [5].
Qualitatively, the data in Fig. 1 show that students' responses are not binary but show a gradually decreasing trend with taxonomic distance (i.e., a decreasing fraction of high-level responses and an increasing fraction of low-level responses).
Different ways of gauging the use of resources by the Defense Department yield the same overall trend over the past half century: Military spending has been a falling portion of the federal budget, defense manpower has represented a decreasing fraction of the nation's work force and defense accounts for a diminishing portion of the nation's research and development funding.
* Part of the reason current IPO valuations are so high is that IPOs are currently taking place later in the company life cycle, at which point employee equity tends to constitute a decreased fraction of the total.
This correlated with a decreased fraction of HVEM-/ CD4+ T cells expressing the proliferation marker Ki-67 (Figure 6I and Figure S2I), and attenuated production of IFNγ and IL-17A (Figure 5).
Transient transfection of pre-miR-193b into 22Rv1 cells caused significant growth reduction due to a decreased fraction of cells in S-phase of the cell cycle.
An open conformation of NEECK was inferred from a decreased fraction of short distances between C270 and C862 in the DEER distribution compared with WT.
In patients with RA a decreased fraction of CXCR5-expressing B cells correlated with the expression of CCR6 (r = 0.53, P = 0.01; data not shown).
