Battery question?

Hi, I've had my iPad since the 8th June and Ive only just noticed that when My ipads fully charged it will say 100% put when I tuned the power off/ disconnect the charger it drops to 98%, I'm a bit concerned as I've only had it since the 8th.
Is this normal?
I'm from the uk and purchased the iPad from pcworld by the way.

Problem solved!
Read a few threads and found that you may have to do a full reboot ( home button and power button)
Tried it and it worked