Earlier quoted context omitted.
Not exactly like that, but close. As % of people with college degrees approaches 100%, all students will have parents with a college degree, so it will approach 5/5. The logic in the parent comment still stands.
What you care about is how much more likely a person with parents who had degrees is to have a degree over one who doesn't. In 1970 4% of people had degrees and 20% of degree holders had parents with degrees. That means that children of degree holders got 5 times as many degrees as children of non-degree holders. In 2020 14% of people have degrees and 66% of degree holders have parents with degrees. That means that c…
That doesn't follow at all? You can't just divide the two percentages and get that conclusion?
In 2020 children of degree holders got twice as many degrees as children from non-degree holders; 66 vs 34. In 1970 children of degree holders got 1/4 as many degrees as children of non-degree holders; 20 vs 80.
Edit: removed math based on wrong assumption