Hi

Yes you can take commerce, maths is a optional subject in commerce. It is not compulsory. You can drop maths and take someother subject inplace of it. But then if you drop maths you wount be able to take courses in BBA, BCA, CA etc. For this courses maths is compulsory. Without maths you can take up courses in B. Com , BBM, LLB etc 

Commerce has nothing to do with maths. The subjects in which you'll require mathematical applications are accountancy and economics and they too doesn't involve the typical maths of integration or trigonometry.  They just involve basic calculations like addition, subtraction, multiplication and division. You can easily take commerce and can do well.