关于一道题的逻辑问题

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 three-quarters only a decade ago.

amounting修饰non-Hispanic Whites,可怎么能说non-Hispanic Whites积聚到略低于整个州人口数的一半呢,应该是non-Hispanic Whites的人口数积聚到略低于整个州人口数的一半,另外,minority是指少数民族还是少部分人？

其实这里不存在比较对象的问题，因为amounting从句做伴随结果状语，补充说明前面句子，换句话说它是非限制修饰前面句子的。对non-Hispanic whites 成为一个少数群体这个主句做修饰说明。当然这里指的是non-Hispanic white人口数，而非non-hispanic whites 本身。