I teach textbooks, but I think the knowledge points should be the same. Review from the meaning of percentage, the difference of score and application. Percentage is widely used in daily life. It comes from score, which is different from general score. When teaching the meaning of percentage, we should start with examples and create situations to let students integrate into life and learn percentage. Through comparison, the concept of percentage is obtained, that is, "the number indicating that one number is the percentage of another number is called percentage". It is important to note that percentages only represent the relationship between two numbers, not numerical values. Percentages cannot be followed by units to indicate specific quantities. This is the difference between percentage and fraction, so percentage is also called percentage or percentage.