The number of class 61 is one eighth more than that of class 62. There is a difference of five people between the two classes. There are () people in class 62

The number of class 61 is one eighth more than that of class 62. There is a difference of five people between the two classes. There are () people in class 62

5 ÷ (9-8) = 5 × 8 = 40 persons