Final answer:
Calculating 98% of 50 adults gives us 49 adults with mobile phones, and 55% of 50 students is 28 students with mobile phones; thus, 21 more adults have mobile phones than students.
Step-by-step explanation:
The question involves using percentages to find out how many more adults have mobile phones as compared to the students. We know that 98% of 50 adults have mobile phones, which equates to 49 adults (since 98% of 50 is 49). If 55% of the students have mobile phones and we assume there is the same number of students as adults (50), then 55% of 50 students would give us 27.5, which we can round up to 28 students with mobile phones. Therefore, 49 adults - 28 students = 21 more adults have mobile phones compared to students.