+8 Jamie conducted a survey on the food preferences of his friends at a school and discovered that 70% of his friends like pears, 75% like oranges, 80% like bananas and 85% like apples. What is the smallest possible percentage of his friends who like all four of these fruits?
at least 20%
at least 10%
at least 70%
at least 25%
at least 15%
