I am 15. I like economics but I am terrible at math. what do I do?
Keep practicing math you'll get better, you just have to stick with it.
Don't go past the undergraduate level. The math isn't too bad until you hit econometrics, which tends to be graduate level work.
study more. Get a tutor and spend more time working on it. You will eventually get it right.
Econ was fun until they added all the math. It's nice to know how one economic policy affects another. Just study hard and take what's required if it gets too difficult. Remember the formulas work if you understand which elements to place in them.