Many mammals sleep for a large proportion of each 24-hour period when they are very young.

I accept that there may be a valid role for a small proportion of what goes on in the City.

This behavior may account for a large proportion of their rapid growth.

It may also be used to describe inadequate housing for a proportion of the population.

But they account for a dwindling proportion of the population.

Official documents account for a large proportion of the primary sources.

However, it may be possible to make a case for a higher proportion of grant aid if the resources available are very limited.

In China, they're trying to get more insurance for a much larger proportion of population.

Of these systems, steel production accounts for a significant proportion.

I had a girlfriend who was responsible for a good proportion of it.