Economics at the undergraduate level does not require a lot of advanced mathematics. But it is among the more mathematically social sciences in college. So it helps to have some mathematical ability.
The usual requirements are elementary calculus, and statistics. These are not hard subjects if your knowledge of basic math and algebra are OK, but if you struggled with those subjects, then they can appear to be more difficult than they really are.
I would look for a program that has a separate calculus course or sequence for business/economics students. It is likely to be more applied and less theoretical, and that may help you.
Second, I would spend the summer before attending brushing up on the math you had trouble with, slowly, at your own pace.
Finally, you can choose your course selection to reduce the math content of your program. Your core courses may involve some math. But many elective choices in economics (I would include economic history, labor economics, some areas of business economics, and development economics among these) are not mathematical.