Task: Question Answering
Input (English): Problem: a corporation paid $ 10 million in federal taxes on its first $ 50 million of gross profits and then $ 30 million in federal taxes on the next $ 150 million in gross profits . by approximately what percent did the ratio of federal taxes to gross profits increase from the first $ 50 million in profits to the next $ 150 million in profits ? 
Options: a ) 0 % , b ) 14 % , c ) 20 % , d ) 23 % , e ) 43 %
Output (English): a