@Roberta,
an example of how we were taught to do math "As many ways as we could" , that question of "boys being 2/3 of the gilrs population" was mot easily done by dividing the boys number in half and to then compare against the value of "thirds" for the girl.
I remember when I got to Public school , after being indoctrinate by the Jezzies, public school math was a total rote subject with no bouts of creativity like Id recalled from Catholic school.
Math is like music or art.