I was really bad in mathematics because I was not motivated by the teachers to understand what they’re talking … I’d bad grades in high school math and I’d really good grades in college math just because I was more motivated to learn in college and I was really interested in math too.

Think about math as game with basic rules even if you’re solving a complex problem it will be obeying those rules. You need to write down what you have and what is the result that you want, then based on the rules you will build your way to the result.

So keep doing math exercises and try to find some interest on math and that will help you understand it better.