Flowdock
number_with_precision(number, precision=3) public

Formats a number with the specified level of precision. The default level of precision is 3. 

 number_with_precision(111.2345)    => 111.235
 number_with_precision(111.2345, 2) => 111.24
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July 9, 2010 - (>= v2.2.1)
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Separator default is not always "." but depends on locale

Locale en:

number_with_precision(111.2345)  # => 111.235

Locale fr-FR:

number_with_precision(111.2345)  # => 111,235

Same with delimiter.