hundredth       
 ordinal number uk/ˈhʌn.drətθ/ us/ˈhʌn.drətθ/
 第一百(个)
100th written as a word
  He is now ranked one hundredth in world tennis. 他目前在世界网坛排名第100位。 
 1991 was the two hundredth anniversary of Mozart's death. 1991年是莫扎特逝世200周年纪念。 
 hundredth       
noun [ C ] uk/ˈhʌn.drətθ/ us/ˈhʌn.drətθ/
 百分之一
one of a hundred equal parts of something
  She has knocked one/a hundredth of a second off the world record. 她将世界纪录缩短了百分之一秒。 
 - More examples
 - For the hundredth time, stop hitting your sister!
 - On your hundredth birthday, you should receive a telegram from the Queen.
 - He's in about one hundredth place on my list of suitable partners!
 - After my hundredth attempt, I eventually got through to his office extension.
 - This is literally his hundredth job application, poor man.