The phrase "an additional proportion of" is correct and usable in written English.
It can be used when discussing an increase or extra amount of something in relation to a whole or a specific quantity.
Example: "The study revealed that an additional proportion of participants reported feeling more satisfied with the new policy."
Alternatives: "a further share of" or "an extra amount of".
Despite an additional proportion of granulocytes (mainly neutrophils), our results showed that there was an overexpression of several interferon-regulated genes.
Inclusion of all ECG-associated SNPs further explained an additional proportion of the heritability for PR (6%%), clearly suggesting cross-phenotype effects for some loci.
Direct municipal costs such as additional costs with media, logistics and social mobilization, were estimated as an additional proportion of total national costs.
It is estimated that 13% of all invasive ovarian cancer patients carry mutations in BRCA1 or BRCA2 (Whittemore et al, 1992; Taylor and Schwartz, 1994), and an additional proportion of patients carry mutations in genes that increase risk of hereditary non-polyposis colorectal cancer (HNPCC).
An additional proportion of foodborne illness is probably caused by a heterogeneous group of less understood agents.
An additional proportion of invariable site (I) was also included whenever possible (PhyML and MrBayes).
can account for a significant additional proportion of the covariation between SAD, CO2 sensitivity and PD [17].
While overall this may explain only a marginal additional proportion of infections, it is likely to underestimate the total number of children infected with HIV in some countries.
Most importantly, behavioral inhibition was also found to explain a substantial, additional proportion of the variance in SCARED-R scores in both the non-clinical and the clinically anxious group (12 and 24%% respectively).
Data are separated by response accuracy: detection and localisation correct (blue bar); the additional proportion of trials where localisation is correct when a ROA is included (dark grey bar); and detection correct/localisation incorrect (light grey bar).
The soil with the combination of gravel and biochar provided the highest control efficiency of 87.85% on atrazine when the additional proportion of biochar was 3.0%.
