The phrase "comprise a small proportion" is correct and usable in written English.
It can be used when discussing the makeup or composition of a larger group or category, indicating that a specific part is relatively minor in size or amount.
Example: "Women comprise a small proportion of the engineering workforce."
Alternatives: "make up a small percentage" or "constitute a minor part."
Mass shootings comprise a small proportion of gun violence, but they disturb America's self-image in a way that the daily torrent of gun deaths does not.
The dark carbonate grains comprise a small proportion of the aquifer sediment (≪ 1%) and are found predominantly in medium-grained lithofacies in the Borden aquifer.
Furthermore, non-reproductive red bats and pipistrelles may prefer to roost near openings to minimize commuting costs when openings comprise a small proportion of a densely forested landscape.
Access to higher education continued to be a daunting challenge, more so to females as female students enrolled into higher education continued to comprise a small proportion of between 10 and 20% during the 1990s (Luhanga 2009 cited in Johnson 2011: 11).
We found that although CDs comprise a small proportion of housing (4% on average), they account for a mean of 11% of privately owned protected lands, and they are often located in close proximity to protected areas (on average <400 m).
Genes contributing to phenotypes that are recognized through our senses (for example, sight or touch) as defining differences between people from different continents (commonly referred to as races) or from different populations comprise a small proportion of the human genome, perhaps 10%to15%5%.
Islands used by cormorants comprised a small proportion (n = 90, 3%) of the U.S. Great Lakes island resource, and < 1% of the total island area.
Recent results suggest that latent TB reactivation comprises a small proportion of the cases [24], therefore, in our approach all cases are considered as if they were generated by recent contact transmission.
Evaluation of the distribution of each component in cytosolic and mitochondrial fractions revealed that WAVE1 exists largely in the cytosol and mitochondrial WAVE1 comprises a small proportion of cellular WAVE protein (Fig. 1D).
Sensitization comprised a small proportion of RUSF-related costs (0.22%) incurred in informing the community and local leaders about the RUSF component of the program.
The drinking population in Sehore District comprised a small proportion of men from the general population, within which a large proportion engages in hazardous, harmful or dependent drinking behaviours (table 2).
