Which method of averaging for management reporting

Hi all, I have a question which I have been pondering on.

Assuming the below performance report:

Day 1
Actual 1
Target 1
Achieve 1/1 = 100%

Day 2
Actual 1
Target 1
Achieve 1/1 = 100%

Day 3
Actual 9
Target 10
Achieve 9/10 = 90%

Which method do you use to report the Achievement for the 3 days?
1. Do you take the average of 100%,100%,90% to give 97%
OR
2. Do you sum Actual (Day1+Day2+Day3 = 11) / Target (Day1+Day2+Day3 =12) to give 92%

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