In a survey, 117 students said that they preferred hamburgers for lunch. This was 45% of the students surveyed. How many total students were surveyed?
we have that
117 students ------> represents 45%
so
Applying proportion
Find out how much students represents 100%
117/45=x/100
solve for x
x=(117/45)*100
x=260
the answer is 260 students