For the first time in the modern era, non-Hispanic Whites are officially a minority in California, which amounts to a little less than half the population of the state, down from nearly there-quarters only a decade ago.

A.    which amounts to a little less than half the population of the state, down from nearly three-quarters only a decade ago

B.     which amounts to a little less than half the population of the state, down from a decade ago, when it was nearly three-quarters

C.     and that amounts to a little less than half the population of the state, down from a decade ago, when they were nearly three-quarters

D.    amounting to a little less than half the population of the state, down from nearly three-quarters a decade ago

E.      amounting to a little less than half the population of the state, down from what it was a decade ago by nearly three-quarters

答案是D.

down from nearly three-quarters (the population of the state)，省略了后面括号里的内容。

我的问题是 three-quarters 应该是形容词吧？quarters需要用复数形式吗？

three-quarters 是名词

three-quarter是形容词

名词-名词　＝ 形容词

名词-名词s　＝ 名词

对吗？

仅限于数字!!