Is GPA really the moist important thing? Is there a huge difference between a 97.7 and a 98.6?
No. Most colleges evaluate GPA on a 4.0 scale, where an A or above is 4.0. Both of those numbers are well above the threshold for an A. It will depend on the academic context of your current high school, though. Colleges don’t just look at numbers.
More important is the rigor of the classes. Once the grades and scores meet the schools threshold, a bit higher does not do much. But the most competitive schools look for outstanding contributions/accomplishments outside the classroom. Pushing for the absolute top grade at the expense of meaningful accomplishments outside the class is not what these schools want to see. They’d rather you spent your time doing something meaningful then studying to move a 780 to an 800 or an A to a A+.
Thanks for the advice @lostaccount, would 2 92s weigh me down? Would they be considered A-s, or would they just take my GPA as it is because it is out of 100 and not on a 4.0 scale?