The phrase "a striking proportion" is correct and usable in written English.
It can be used to describe a notable or significant ratio or percentage in various contexts, such as statistics, demographics, or comparisons.
Example: "In the recent survey, a striking proportion of participants reported feeling more optimistic about the future."
Alternatives: "an impressive ratio" or "a remarkable percentage".
A striking proportion of Israel's high-tech entrepreneurs went into business with friends they made in the Israeli Defence Forces.
A striking proportion of professional knowledge can be turned into routine action, and the division of labour can bring big efficiencies to the knowledge economy.
A striking proportion of the correspondence, for example, concerns exchanges of good wishes, suggested appointments and invitations to dinners or golf tournaments, and few of the letters evince any particular interest on Mr. Bush's part in policy.
The Rhizobiales species analyzed showed a striking proportion of orthologous genes, mainly chromosomal syntenic; non-syntenic genes were found in lower proportion.
A striking proportion of patients (8 of the 39 patients, all in patients referred with unexplained pain) were found to have conventional mechanisms of failure.
A striking proportion commented on the nutritional impact of their changed diet, and weight loss, in addition to being more physically active, getting stronger, walking more easily.
These genes were not up-regulated after MS. A striking large proportion of genes encoding cytoskeletal components were down-regulated both after IR and UV.
Mr. Sprouse's designs are immediately identifiable by their brash shapes, strong colors and striking proportions.
He is credited with the design of the original SLK, whose striking proportions, wrap-around tail lights and hood with twin bulges earned wide admiration.
The stone temples of Easter Island, the Society Islands, and the Marquesas, even in their ruined state, display striking proportions and design; clever use of stones of different colours, shapes, and textures; and the evidence of sound combination of practical engineering with artistic objectives.
Some rural areas had even more striking proportions of child poverty.
