Peter Roome writes:
 > Hey guys.
 > 
 > Having difficulty figuring out where to begin with trying to round a
 > calculation to the nearest 0.05. Can anyone offer any suggestions
 > please?
 > 
 > Kind Regards
 > 
 > Pete
 > -- 
 > Posted via http://www.ruby-forum.com/.
 > 

Just off-hand, my initial reaction would be:

  (a * 20).round.to_f/20

where "a" is your variable.  Some quick tests with irb seems to show
this as working.  

Coey