Subject + 大幅 + Verb
大幅 (dàfú) is an adverb meaning "substantially," "significantly," or "by a large margin." It is placed before a verb to emphasize that the degree of change is large. It is commonly used in news reports when describing records, prices, or statistics.
今年公司的利润大幅增长了百分之三十。
jīnnián gōngsī de lìrùn dàfú zēngzhǎng le bǎifēnzhī sānshí.
This year the company's profits grew significantly by thirty percent.
新政策出台后,房价大幅下降。
xīn zhèngcè chūtái hòu, fángjià dàfú xiàjiàng.
After the new policy was introduced, housing prices dropped significantly.
这款产品经过改进后,销量大幅提升。
zhè kuǎn chǎnpǐn jīngguò gǎijìn hòu, xiāoliàng dàfú tíshēng.
After improvements, this product's sales increased significantly.