The key thing to note is that percentage means that number over 100. Thus 55% can be written as 55/100. This converts to the decimal 0.55. If we then multiply this by 80, we get 44. 44 peach yogurts were sold on Monday.
7300-5500=1800 needs to come from salespeople. To make at least 7300, the salespeople need to make at least 1800, which means: 300 x number of people >= 1800 Number of people >= 6 C is correct
