Accounting? Accounting is probably NOT the best profession for someone who has trouble with numbers. Financial math/accounting, however, is different from trig and calculus; nevertheless, it's probably not a good idea for someone who is bad with numbers.
I would say accountancy is probably not going to be easy for someone that has weak math skills. If you are good with basic math, then you may find some basic accounting methods are easy to learn. However, accounting can be very confusing and difficult, and if math is your weakness, you are likely to find you are not successful.