The phrase "and growing proportion of" is correct and usable in written English.
It can be used to describe an increasing percentage or share of a particular group or category over time.
Example: "There is an increasing concern among citizens about climate change, with a growing proportion of the population advocating for sustainable practices."
Alternatives: "an increasing share of" or "a rising percentage of".
With each separation, the county was left with a shrinking tax base and growing proportion of black students.
Conflict remains a steep barrier, with a high and growing proportion of out-of-school children living in conflict zones," the report said.
However, conditions amenable to surgical treatment such as injuries, cancer, congenital anomalies, and complications from childbirth comprise a significant and growing proportion of global death and disability.
At the same time, a large and growing proportion of scientists working the field agreed that industrial activity had contributed significantly to rising temperatures.
For most OECD countries, however, the high and growing proportion of long-term unemployed is a threat to their economic growth.
In the Netherlands and in the Anglo-Saxon countries a big and growing proportion of drugs are sold by supermarkets and other general retailers (see chart).
Social enterprises and co-operatives are now outperforming traditional businesses; alternative banks have had better returns on assets, lower volatility and higher growth, and a growing proportion of start-ups are socially-driven.
Federal judges have over the years allowed a succession of majority-white cities to pull their schools out of the Jefferson system, leaving the county schools with a smaller tax base and a growing proportion of low-income and black students.
Nearly 5,000 civilians have been killed or injured so far in 2015, and a growing proportion of them are women and children.
With the substantial morbidity and mortality associated with COPD [ 2], and the growing proportion of people with COPD, there is an increasing need for cost effective treatment strategies.
But millions speak it beautifully, and books written by Indians make up a large and rapidly growing proportion of the English-language literary canon.
