The phrase "a much lower share" is correct and usable in written English.
It can be used when comparing proportions or percentages, indicating that one entity has significantly less than another.
Example: "In the latest market analysis, Company A holds a much lower share of the market compared to its competitors."
Alternatives: "a significantly smaller portion" or "a considerably reduced share."
Ukip secured its first Scottish MEP in May, though with a much lower share of the vote than in England.
That's a higher share than big companies pay for single plans, but a much lower share for family plans.
Indians constitute only 1 percent of the population, a much lower share than in other Andean countries.
Even when unionized employees are required to pay part of their family insurance premium, they pay a much lower share of the premium than nonunionized workers do.
Even when unionized employees are required to pay part of their family insurance premium, they pay a much lower share of the premium than nonunionized workers do 13percentt of the premium compared to 32percentt.
For developing countries not only is GDP significantly lower, but a much lower share of national income is collected in taxation – just 13% as opposed to an average of 35% in OECD countries (pdf).
It has a much higher share of transit users, and much lower share of solo drivers, than the national average.
Detroit's Big Three automakers have a much lower market share than they once did.
"Both the IMF and World Bank have structures that are weighted very heavily in favor of the US and Europe, and emerging economies and low income countries have much lower shares in both institutions," Gail Hurley, a researcher at the United Nations Development Programm, told VICE News.
Now they buy the tapes at a much lower price, and share rental revenues with the studios.
Medicare currently has a much lower administrative cost share than other forms of insurance, but it also covers sicker people, distorting such comparisons.
