i do not understand this question, what do i do??

Answer:
90 shoppers have cookies or fruits as their favorite snack.
Step-by-step explanation:
First add 15% and 15% to get a total of 30% then multiply 300 by 30 to get 9000 and divide that by 100 to get your answer of 90.
Answer:
90
Step-by-step explanation:
so if there are 300 shoppers and 10% of 300=30
we also know that if you add the % from people who got cookies to the % of people who got fruits you would get 15+15=30
30% of 300 is the same as 10% times 3 so if 10%=30 then that times 3 =90