Okyere currently only KNUST forms are out for undergraduate admissions. Your grade does qualify you to apply for all programmes at your desired universities. But your best admission opportunities for business courses using your grade as a regular student are found here:
B.Sc. (Mathematics with Economics) at UCC
B.Sc. (Mathematics with Business) at UCC.
However you can apply for BSc Admin at KNUST and UG(legon) as well as Bachelor of Management and Bachelor of Commerce at UCC as a fee-paying student due to highly competitive nature of the course resulting in it having a very high cutoff point.