The phrase "a substantial majority are" is correct and usable in written English.
It can be used when discussing the proportion of a group that holds a particular opinion or characteristic.
Example: "In the recent survey, a substantial majority are in favor of implementing the new policy."
Alternatives: "a significant majority are" or "most people are".
Equally, in the case of managing the risks of vendor lock-in, it is encouraging to note that respondents expressed by a substantial majority are slightly (39.4 %), moderately (33.7 %), and quite likely (22.1 %) to use a cloud computing risk management framework to manage vendor lock-in risks and compliance requirements effectively.
The largest single group among those on long-term sickness absence are people working within health care, of which a substantial majority are women (84% in 2005) [ 11], reflecting a highly gender segregated labour market.
A substantial majority were in favour of punishing Briatore but Bernie was in a minority".
Nearly 10m peasants were moved and a substantial majority were forced to give up their land.
In conclusion, the document stated: "An analysis of the responses indicated that a substantial majority were against the licensing plan being adopted because of concerns over environmental effects".
And a Bloomberg survey of 1,253 investors, analysts and traders found that a substantial majority were dubious about the eye-popping valuation Facebook was seeking.
Seven of the 10 board members are independent of Microsoft, which is consistent with the requirement in the company's governance guidelines that a substantial majority be independent.
"The substantial majority were research or medical personnel," he said, "which is what you'd expect".
The American people, by substantial majorities, are concerned about air and water pollution, and largely trust the E.P.A., national surveys say.
Interestingly, a substantial majority (15/18) are significantly more abundant in the OA group than in the healthy group.
He wrote: "To our astonishment, when we came back... in March 1966 with a substantial majority, there was no devaluation and growth was held back, in the interests, as we saw it, of maintaining an overvalued pound.
