The numerator and denominator of a fraction have only one common factor 1, and a fraction like this is called the simplest fraction.

Changing a fraction into an equal fraction with smaller numerator and denominator is called divisor.

Same score:

If a number is a common multiple of the other two numbers, then this number is called the common multiple of the other two numbers, and the smallest common multiple is called their smallest common multiple.

Dividing the scores of different denominators by the scores of the same denominator is equal to the original score, which is called the same score.