Could be innate. My part time job forces me to make 10-20 micro decisions an hour. Most involve minimizing negatives and max positives. And knowing what to ignore.
Yet my co-workers are quite unable to even know how to get 10% from a cash register total. Other managers lack a "math approach" imo to want to get sales numbers or staff assignments. For example, what should you do if you have 80 hours of work and only 70 hours of workers? Some fail because they can't even frame the task that way.
Could be vocation only. Get paid by using math, you are one.
I'm still thinking