Why don't the percentages on the battery chart add up to anywhere near 100%?
Since you have last charged your device, its displaying the ratio [usage time/time since charged] * 100 of that service
It might be that you didnt use any service and the screen was off most of the time
If you use many apps simultaneously (consider using 4 apps at a time) using these all the time till your phone gets discharged will show the time for these apps to be 100% but if you add these %ages for all the apps it will be greater than 100