Okay thanks. Just a quick question when I got the laptop it was on 97% battery and I just used it from then on. Could that be why it is 97%?
No, that had nothing to do with it. Some batteries show over 100% when new, some less. It's only an estimate, after all, and will fluctuate up and down over time.
How would I go about getting it to 100%?
You don't. While it will fluctuate over time, the general direction is down, as all batteries deplete and die over time. Just use your Mac and don't obsess on the battery readings.
Run on battery whenever you need to and plug it in whenever you can. You can plug or unplug any time you need to, regardless of the charged percentage, and you never need to completely drain your battery. Just make sure you don't run on AC power exclusively, as your battery needs to be used regularly to stay healthy.