Seems really bad and battery problems really gets fustrating at times..
Check if you have any apps you recently installed that might be causing the drain (Games tend to stay in background hogging batteries)
Reflash your rom if possible, with a full wipe to be assured of no rogue apps.
If the problem persists, then it might be due to a worn out battery. Replacing the battery usually solves most problems
LG Nexus 4: CM M4
Asus Nexus 7: CM M2
Click the Thanks button if I did help you out! >>>