ninety       
number uk/ˈnaɪn.ti/ us/ˈnaɪn.t̬i/
A2 (数字)90
the number 90
  eighty-nine, ninety, ninety-one 89, 90, 91 
 Ninety percent of the people surveyed were in favour of the new rule. 90%的被访者表示赞成。 
 - More examples
 - He must be ninety if he's still alive.
 - So I'm going to be talking to over ninety people, am I? I don't like the sound of that!
 - Dad might be nearly ninety but he's still young at heart.
 - He got a speeding ticket for driving at ninety miles per hour on the motorway.
 - They invited ninety guests to the wedding.
 
Idiom   
ninety-nine times out of a hundredidiom (also nine times out of ten) 几乎总是
almost always
  Ninety-nine times out of a hundred everything's fine, but sometimes we have problems. 大多数时候一切顺利,但我们偶尔也会出现问题。