The number of class 6 (2) is 12.5% more than that of class 6 (1). There are 45 people in class 6 (2). How many people are less in class 6 (1) than that of class 6 (2)?

The number of class 6 (2) is 12.5% more than that of class 6 (1). There are 45 people in class 6 (2). How many people are less in class 6 (1) than that of class 6 (2)?

45÷(1+12.5%)=45÷9/8=40
45-40=5
Answer 5 less