The phrase "an extremely high proportion" is correct and usable in written English.
It can be used when discussing a significant percentage or fraction of a particular group or category in a context such as research, statistics, or analysis.
Example: "In the survey, an extremely high proportion of respondents indicated that they preferred online shopping over traditional retail."
Alternatives: "a very large percentage" or "a significantly high ratio."
In the week that ended June 28, 57percentt of Mr. Jackson's album sales were downloads, an extremely high proportion.
More than 60% have difficulty communicating, while an extremely high proportion have emotional and mental health needs.
"Our technical analysis shows that a system with an extremely high proportion of renewable electricity generation located in Scotland can be secure and stable," said Paul Gardner, lead author of the report for DNV GL. "There is no technical reason requiring conventional fossil and nuclear generation in Scotland.
About 1909 the German chemist Fritz Haber ascertained that nitrogen from the air could be combined with hydrogen under extremely high pressures and moderately high temperatures in the presence of an active catalyst to yield an extremely high proportion of ammonia, which is the starting point for the production of a wide range of nitrogen compounds.
This means that an extremely high proportion of students learn science through a second or third language, and thus a language that is not spoken at home, a trend that continues through secondary school.
Consistent with its role as a storage protein, blad contains an extremely high proportion of the nitrogen-rich amino acids.
He argued that while "a valid [referendum] is always better than an invalid [referendum]" the extremely high proportion of no-voters still gave him a mandate to go to Brussels next week "to ensure that we should not be forced to accept in Hungary people we don't want to live with".
We considered using a Cox proportional hazards regression model; however, the extremely high proportion of censoring in our data (more than 96% of the sample did not die during the three-year period) meant that standard measures of model fit, such as R-squared based measures, would have been unreliable.
Although the extremely high proportion of a low CD4 count in patients in our study might have been confounded by a temporary malaria-induced reallocation of specific T cells; 70% had a CD4 count <350/µL 1 month after successful treatment.
This likely contributed to the extremely high proportion of very fine ash coughed out of Eyjafjallajökull back in 2010, which escaped over the sea through the eruption column's umbrella region.
However, the extremely high proportion of cuticle constituents convinced us that this too is a biological phenomenon.
