For this case we have to:
The female bankers earn $ 4190
The male bankers earn $ 3860
The difference in salaries is:
So:
To know the percentage, we make a rule of three:
4190 -----------> 100%
330 -------------> x
Where "x" represents the percentage of earnings that the female bankers earn more than from male bankers.
%
Answer:
$ 330
7.88%