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I want to say

> One of ten people in the world suffers mental disorder.

My attempt but incomplete is as follows,

> 世界のなかに「。。。。」が精神障害に苦しんでいます。

How to say "One of ten people" in Japanese?
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2015-09-29T16:53:29.347
28383
2015-09-30T07:33:46.120
11192
question
grammar
How to say "one of ten people ..." in Japanese?
You can say

> [１０人]{じゅうにん}に[１人]{ひとり}

(「X人にY人」= "Y out of X people" / "Y in every X people")

so

> One of ten people in the world suffers mental disorder.

would be like

> 世界では１０人に１人が精神障害に苦しんでいます。or  
>  世界の１０人に１人が精神障害に苦しんでいます。

* * *

You could also use

> １０人[中]{ちゅう}１人  
>  １０人のうち１人

(「X人中Y人」/「X人のうちY人」 = "Y of X people")

as in

> 世界では１０人中１人が精神障害に苦しんでいます。or  
>  世界では１０人のうち１人が精神障害に苦しんでいます。
CC BY-SA 3.0
2015-09-29T17:14:08.983
28384
2015-09-30T07:33:46.120
2015-09-30T07:33:46.120
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9831
28383
answer