per cent用法说明

①用于修饰形容词或副词（包括其比较级）。如：

I think it is ninety per cent probable. 我想这有90%的可能性。

Salaries are from 10% to 50% higher than in Britain. 薪金比在英国高10%到15%。

②用于修饰动词。如：

Unemployment has increased 1.5 per cent. 失业率增加了1.5%。

Prices have risen 5.5 percent in the past year. 过去一年物价上涨了5.5%。

有时修饰动词过去分词。如：

He was, however, not a hundred percent convinced. 但他还不是百分之百相信。

③用于修饰介词短语。如：

The output value of chemical fertilizer in the first quarter was 18 per cent above that of the same period in 1990. 第一季度化肥总产量比1990年同期增长了18%。