Ask HN: Successful business owners, what % of opportunities work out?

Hi guys,

I'm interested in getting a bit of perspective from those of you running successful businesses.

What percentage of the possible opportunities that come your way do you think actually turn out to happen?

I'm talking about potential work that customers approached you with or you approached them about. Or potential partnerships and business opportunities that popped up and were discussed with external parties along the way etc.

Did the percentage of opportunities that were successful increase dramatically as time went on and your business grew or has it always been about the same?