沪江小Q / 全部问题 / 能力英语 / 听力

11月15日慢速VOA中，有这么一句：
The study says that means their catch has fallen by ninety percent from their highest levels.

by ninety percent,翻译成“减少了90%”，还是“减少到90%”？

请各位指点，谢谢！