The phrase "although the portion of" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding a specific part of something being discussed.
Example: "Although the portion of the report detailing the financial projections was well-received, the overall feedback was mixed."
Alternatives: "even though the segment of" or "despite the part of".
Although the portion of the IPO market accounted for by life sciences companies declined to 41% from 47% in 2015, this market share compares favorably to the 40% figure in 2014 and is well above the 17% figure for the five-year period preceding 2014.
Although the portion of what is now NY 370 from Cato to Liverpool was state-maintained by 1926, it remained unnumbered until the late 1920s.
Although the portion of exons whose length is a multiple of 3 among conditional exons is slightly larger than that among constitutive exons (42% vs. 40%), the Fisher's exact test p-value is 0.15 (one-tailed p-value 0.08).
1 2 Although the portion of physical disability that is associated with inflammation is generally reversible, the component associated with joint damage is thought to be largely permanent.
Furthermore, although the portion of patients with renal involvement was higher in the high cOPN quartile vs. low cOPN, these differences did not reach statistical significance (8/11 and 8/16, respectively in pSLE; 4/11 and 0/4, respectively in aSLE) (Table 2).
Thus, that district could be competitive as well, although the portions of it east of Chesapeake Bay are idiosyncratic enough politically and culturally that it is hard to know for sure what will happen there.
Although the decision directly conflicts with the portion of House v. Mayo, 324 U.S. 42, 48, 65 S.Ct.
Chief Justice William H. Rehnquist and Justices Clarence Thomas and Sandra Day O'Connor joined the dissent, although Justice O'Connor did not sign the portion of Justice Scalia's opinion that discussed the constitutional issue.
Along the Maryland coast, the storm was less severe than the Perfect Storm in the previous year, although the strongest portion of the storm remained over New Jersey for several days.
The wave entered the Caribbean Sea on September 5, although the northern portion of the wave axis later developed into Hurricane Ingrid.
Although the portion size of many food items have increased, and laboratory studies find that more is eaten when more is on offer, this does not establish the real world importance of the phenomenon.
