The row 'girls' represents the population of girls who answered the survey. There were 50 total, and 32 answered for brand A. 32/50 is the fraction representing the number of the total girls which answered brand A.
Step 1: Determine the percentage of girls that were surveyed that prefer Brand A cell phones
There are a total of 50 girl students and out of those 32 girls prefer Brand A cell phones. This means that 32/50 = 64% of all the girl students prefer a Brand A phone.
