As a suffix, 率 turns nouns/verbs into quantifiable rates: 成功率 (success rate), 就业率 (employment rate), 出生率 (birth rate), 合格率 (pass rate), 增长率 (growth rate), 利率 (interest rate).
mistakes
率 has two readings: lǜ (rate/ratio) and shuài (to lead). As a suffix meaning 'rate,' it is always lǜ. In 率领 (shuàilǐng, to lead) and 率先 (shuàixiān, to take the lead), it is shuài.
