1. Method: Find the greatest common factor of numerator and denominator, and then divide the numerator and denominator by the greatest common factor to get the simplest score.

2. Reduction is partial reduction. The numerator and denominator of the fraction are divided by the common factor at the same time, and the value of the fraction remains unchanged. This process is called reduction.

3. The basis of the score reduction: the basic nature of the score.

4. Try to calculate with your mouth. Generally, the numerator sum is used to change a fraction into an equal fraction, but the numerator and denominator are relatively small, which is called approximate fraction. Denominator common factor removes the numerator and denominator of the fraction; Usually, we have to separate it until we get the simplest score.