my macbook battery percentage won't change

[sunshine3033]

so a couple of weeks ago, i noticed that my battery was stuck at 77%. it would not change over time, but the computer would still die if it was off the charger. also, when i plug in my charger, the orange light comes on, but the computer itself never says that it is charging, and the light never turns green. the computer still works fine (knock on wood) but it's just slightly annoying that my brand new macbook is beginning to have battery problems. i searched before i posted this to see if it is a widespread issue but i didn't see anything that described my problem. thanks in advance!