Hey there! I know your worry has already been addressed, but I'd like to share my personal experience
.
In year 9, I received a score below 60% for my maths exam at the end of the year. In year 10, I received an average of 85% (tech-able and tech-free).
I'm in year 11, currently doing methods 1/2. I got 91% on the first test.
I wanted to tell you this to show you that improvement does exist. I remember in year 9, I was super duper upset with my score that I didn't even look through the exam for fear and embarrassment of my score. I also go to a selective entry school, where competition is high, and almost everyone got high scores. I was devasted. I wasted a lot of my time fretting over my score and worrying that I'd never be good at maths ever again and there was no point in me every trying. Then somehow, I regained motivation (magically) and began working harder. Not as hard as I could have or should have, but I put in enough consistent effort throughout the year in year 10. I do recall for some topics never doing any of the exercise questions because I had to 'focus on my 1/2', which I now think was silly of me because more than half the things I learnt in 1/2 didn't even carry onto 3/4. I regret not putting in enough effort in year 10. Now, I have to 'focus on my 3/4's' but I know better than to neglect my 1/2's completely.
Don't be upset about the first score you get. Take that test, look at where you can improve and work on it. Don't throw it in the bin like I did, but find where you went wrong and ensure you fix it. You take that 73% and turn it into whatever score you want next time - I know you can do it. I guarantee that you will improve if you put in enough effort. Remember - the more time you waste thinking your score was 'bad' (a 'bad' score varies from person to person), the more you prolong your potential for improvement.
Whevever you are, whatever you are doing, no matter what scores you have recieved in the past,
you can do it.
Good luck - and I believe in you pal