There are 50 students in class 61, a quarter more than class 62. How many students are there in the two classes?

There are 50 students in class 61, a quarter more than class 62. How many students are there in the two classes?

Class 62 has 50 / (1 + 1 / 4) = 40 people
There are 50 + 40 = 90 people in total