Each yogurt is topped with 8 banana slices. One banana will yield 10 slices. If Vivian needs to make 5 yogurts, how many bananas does she need to buy? Give me reasons, before answering the question
To make the yogurts, Vivian needs 5 x 8 = 40 banana slices. She needs to buy 40 / 10 = 4 bananas. So the final answer is 4.