> And the persons replying assumed that I had no idea about what I'm doing. Which isn't really nice.

This is simply not true. Your original response strongly implied that you were confusing decimal with floating point. If you reread your original reply strictly in the context of the original comment, you may notice what I'm talking about. The responses were just pointing out the difference, and doing so quite nicely I might add.

This is one of those cases where your reality was not successfully communicated in your message. Your original message, in the context in which it was presented, fairly clearly implied that you thought floating point and decimal are the same thing. That might not be the intent, or the reality, but it's what you managed to convey. Hence the thread.