Noun + 率
The noun 率 (lǜ) means "rate," "ratio," or "proportion." It is a suffix-like noun commonly attached to other words to form specific rates, such as 通胀率 (inflation rate) or 失业率 (unemployment rate). It is widely used in economic, scientific, and statistical contexts.
今年的失业率比去年低了一点。
Jīnnián de shīyè lǜ bǐ qùnián dī le yīdiǎn.
This year's unemployment rate is a little lower than last year's.
这个城市的犯罪率很低,住着很安全。
Zhè gè chéngshì de fànzuì lǜ hěn dī, zhù zhe hěn ānquán.
This city has a very low crime rate, so it's very safe to live here.
通货膨胀率已经连续三个月上升了。
Tōnghuò péngzhàng lǜ yǐjīng liánxù sān gè yuè shàngshēng le.
The inflation rate has been rising for three consecutive months.