According to the question there are two classes, class A and class B consisting of 25 and 30 students respectively out of which 20 students from class A passed in First class and 24 students from class B passed in First class.

The Fraction is the ratio of objects or entity to the total number of object or entity present.

for example,

There are 5 bananas out of which a person buys 2 bananas, the the fraction of bananas consumed by the buyer is 2/5.

therefore,

The ratio of students from class A passed in First class = 20/25 = 4/5

therefore, 4/5 fraction of students from class A passed in First class.

therefore,

The ratio of students from class B passed in First class = 24/30 = 4/5

therefore, 4/5 fraction of students from class B passed in First class.

fraction of students from class A passed in First class= fraction of students in class B passed in First class= 4/5.

Hence, in both the classes the fraction of students passed in First class is equal and not greater or lesser than any of the class.