Using it's concept and the relative frequency table, it is found that the percentage of the students who chose mathematics that were freshmen is of 20%.
The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:
[tex]P = \frac{a}{b} \times 100\%[/tex]
The proportion of students who choose Math was:
0.06 + 0.08 + 0.12 + 0.04 = 0.3.
Of those, 0.06 were freshmen, hence the percentage is given by:
[tex]P = \frac{0.06}{0.3} \times 100\% = 20\%[/tex]
More can be learned about percentages at https://brainly.com/question/10491646
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