The phrase "a minimum proportion of" is correct and usable in written English.
It can be used when discussing the smallest amount or percentage of something that is required or expected in a particular context.
Example: "The study requires a minimum proportion of participants to be from diverse backgrounds to ensure accurate results."
Alternatives: "a minimum percentage of" or "a required fraction of".
Moreover, legislation can be passed in the Assembly only if it has the support of a minimum proportion of both unionist and nationalist members.
"Mandatory inclusionary zoning" would raise permissible density in some areas, but developers would have to ensure that a minimum proportion of units meets the city's definition of affordable.
One of its tasks is fending off American cultural domination by enforcing a requirement that radio stations and television channels air a minimum proportion of Canadian content.
Moreover, legislation can be passed in the assembly only if it has the support of a minimum proportion of both unionist and nationalist members.
Dr. Schwartz said he and his colleagues have always wanted to talk about staffing — ideally, they wanted to agree on a minimum proportion of doctors to patients — and how this affected patient safety.
The main way of keeping banks safe is through international rules, known as the Basel accord, that limit their exposure to risk by stipulating that their capital must at least equal a minimum proportion of their assets (weighted by risk).
In the second problem our goal was to maximize the number of birds protected across its entire range by adding the constraint of maintaining a minimum proportion (≥30%) of each regional breeding population (Supporting Information, Text S1 i).
We looked at how government spending changes after countries implement electoral gender quotas that require a certain minimum proportion of women in political institutions.
In other countries, where parties field many candidates for districts with several representatives, quotas require parties to have a certain minimum proportion of female candidates on their slate.
For strike votes, what is required is that a specified minimum proportion of eligible union members must actively vote to strike.
Require the banks to keep a certain minimum proportion of their assets in reserve, monitor their lending policies, place restrictions on the businesses they can enter, and so forth.
