One-fourth used in a sentence

One-fourth in a sentence as a noun

"Four times as less" -> "four times fewer" or "one-fourth" ?

I felt The Lean Startup could've been written in one-fourth of the amount of pages Ries used.

Less than one-fourth of the individuals in the top 1/100th percent in 1996 remained in that group in 2005.

For each incorrect answer one-fourth of a point is deducted.

Both of those pairs would share one-fourth of their genes; how would 23andMe be able to tell them apart, other than looking at their ages?

Look at it from the point of view of the artist: there's a customer out there who likes four of his albums but who has only paid for one. So the artist is only getting one-fourth of the economic feedback he should be getting to create more content.

In the District of Bellary, with which I am personally acquainted,—a region twice the size of Wales,—one-fourth of the population perished in the famine of 1816-77.

Only about one-fourth of Americans have ancestors who were speakers of English before arriving in North America.

Jews represented one-fourth of all university students and 43% percent at Budapest Technological University.