There are 40 students in class 61 and 50 students in class 62. What is the percentage of class 61? What is the percentage of class 62?

There are 40 students in class 61 and 50 students in class 62. What is the percentage of class 61? What is the percentage of class 62?

The number of people in class 61 is 40 △ 50 = 80% of that in class 62
The number of class 62 is 50 △ 40 = 125% of that of class 61