What math did you complete previously?
If you were underplaced into algebra 2, then it is best to change into the math course that is actually the next one following what you have completed.
If you are unsure of how your previous math courses align with US math courses, you may want to try the following quizzes to see if you know the prerequisite material for intermediate algebra (high school algebra 2), college algebra (high school precalculus), and calculus 1: Web-Based Are You Ready quiz/reviews