Hi there.
It's good to see that you're working out daily averages for yourself. It's a good way to check up on your control.
Does your testing machine have on it a function that'll tell you your average? I know that there are some on the market that do tell you what your average is itself.
In answer to your question though, yes, that makes it 7.5 as your average. Rounding laws in maths hold that if the smallest digit is 5 or above, you round up, and if it is 4 or below, you round down. Example 7.44=7.4 and 7.45=7.5.
I hope this was useful to you!