6.746913
Since 3 is less than 5 it drops: 6.74691
Since 1 is less than 5 it drops: 6.7469
Since 9 is more than 5 it carries a one over: 6.747
Since 7 is more than 5 it carries a one over: 6.75
Since 5 is equal to 5 it carries a one over: 6.8
The answer is 6.8