6-3:9

It looks like you're providing a mathematical expression: 6 - 3:9. Could you please clarify what you mean by the colon (:)? Are you referring to division, or is it part of a ratio or another operation?

If it's division, then the expression could be interpreted as:

6 - (3 ÷ 9)

Let me calculate that:

3 ÷ 9 = 1/3

Then:

6 - 1/3 = (18/3) - (1/3) = (17/3)

So, the result is 17/3 or approximately 5.67.

Please confirm if this is what you meant or provide more details!