The phrase "a considerable proportion is" is correct and usable in written English.
It can be used when discussing a significant part or percentage of a whole in various contexts, such as research, statistics, or analysis.
Example: "In the survey, a considerable proportion is in favor of implementing the new policy."
Alternatives: "a significant portion is" or "a large percentage is".
Of those a considerable proportion are of foetuses which have got a congenital abnormality.
Hundreds of thousands of patents are issued each year, and a considerable proportion are for chemicals – how they can be used and how to make them.
Meanwhile, groups like the Center on Wrongful Convictions and the Innocence Project were publishing statistics on wrongful convictions and found that a considerable proportion were based on false confessions.
Professor Wendy Savage, a gynaecologist and campaigner, has defended the "very small" number of abortions that take place over 20 weeks and said a considerable proportion are of foetuses with a congenital abnormality, some of which will not be picked up until a late stage in the pregnancy.
Of anti-SA-negative RA sera, a considerable proportion was anti-CCP-positive, albeit at a lower titer.
The proportion of oedema in SAM peaked at three to five years of age and a considerable proportion was above 5 years.
A considerable proportion are for short stays, often where no procedure is carried out; [ 11, 12] they include 'high intensity users' with long-term health conditions admitted with acute exacerbations of their illness.
The cross-tabulation of MAU categories by age showed that the majority of subjects (n = 283; 45%) were in the same category at both ages, but a considerable proportion were better off (n = 160; 25%) and an even larger proportion were worse (n = 187; 30%).
This is a considerable proportion and is comparable to the relative cost of dental healthcare (6.2% of total), which represents an important medical expense for many households.
