I wonder if Mr. Allen could post a specific example of the type of problem he is struggling with so some of our more math oriented members could lead him through the thought processes necessary to complete these type of problem(s)
I don't believe we'd be able to help. When something comes naturally, it can be very hard to see where someone is struggling. If we do see where someone is struggling, it can also be very hard to know what to do about it, as we may not have struggled ourselves. Even if we overcame this ourselves, we did this so long ago, that we may not remember what helped to understand it.
I believe the best people to help in this situation are either teachers, or people who just recently managed to understand. Both these people are found at the college, as either the course instructors, or the students.
In addition, there is much self help online these days, which didn't exist when he was first taught this at school. Simply googling "ratios" comes up with many websites and videos with the aim of teaching the subject. I would imagine this is the case for every single topic, as now learning is very online.
I don't believe
@Mr Allen should give up after one day, because he didn't understand straight away. You can't expect to understand something straight away, especially when it was first taught to you decades ago. If you keep trying, using both the college resources (e.g. the teachers) and online resources (
this link), you should be able to make some progress.