only your treatment providers can explain what these mean to you and your situation. I can tell you in general that percentile just means compared to others in your location that are in your age group and problems that took the test.

example if 100 people in my age bracket with the same problems I have took a test and the score was 50. that means I am right in the middle. (50 people age braacket 25-40 with my same problems scored lower than me and 50 people aged 25-40 scored higher than me)

some percentiles work with higher number means you scored low and some higher percentiles mean you scored high. depending upon which chart they are using.

example if I scored 83 percentile on some charts that means I am at the top of the list like scoring in high school where you aim to score 100 points is thehighest and best. where as on other charts that means Im lower part of the list if they are considering 1 to be the highest and 100 the lowest.

see what I mean only your treatment provider can interpret what these scores mean in your situation because only they know what kind of percentile charting system goes along with the exact test numbers \versions\ and such you took.

my suggestion contact your treatment provider, they can help you to understand what your scores mean in relation to your diagnosis, age, culture and other issues that have to be considered now.