The number of reading components in the math score of the second day of junior high school. A/B formula (A and B are algebraic expressions, and B contains letters) is called a fraction. Where a is called the numerator of the fraction and b is called the denominator of the fraction.

When the numerator of a fraction is less than the denominator, we call it a true fraction. When the numerator of a fraction is higher than the denominator, we call it a false fraction.

Note: to judge whether a formula is a fraction or not, the key is to meet the following requirements: the denominator of a fraction must contain letters and the denominator of a molecule is an algebraic expression. There is no need to consider whether the score is meaningful, that is, whether the denominator is zero.