Dear KshamaFegade,
I have tried my level best to write down the solution steps so that anyone can follow it but if u still can't do it on your own, then grab a friend's assistance who is likely to be having sound knowledge of operating system.
Ignoring the problem will result in displaying warning messages of CONSIDER REPLACING BATTERY whereas it is itself a very annoying issue. On the other part, your laptop will act accordingly with that percentage meaning that it will turn off or hibernate
or put it on sleep on the percentage of last full charge. You can see that following those steps have addressed many people issue so you might be lucky if this solution solved your issue too....