Explanation:
you filled out the table correctly.
but now what is meant by "how many" ? the absolute number of prone in the study ? or the percentage (as an assumption for the whole population ?
based in the table
25 people (or 50%) regularly text while driving.
7 people regularly text while driving and did not get a citation. that if is 7 of 25 regularly texting people (or 28%). and 7 out of 50 people in total (or 14%).