A number indicating that one number is a percentage of another number is called a percentage. Percentages are also called percentages or percentages. Percentages are usually not written in the form of fractions, but are represented by the symbol "%"(called percent sign). Write 4 1% and 1%. Because the denominator of percentage is 100, that is, 1%, which is convenient for comparison, percentage is widely used in industrial and agricultural production, science and technology and various experiments. Especially in surveys, statistics, analysis and comparison, percentages are often used. There are many percentages in life: in the weather forecast program on TV, the weather situation and precipitation probability of the night and tomorrow will be reported every day, reminding everyone to prepare in advance, just like the precipitation probability of tonight is 20%, and there will be five to six strong winds during the day tomorrow, and the precipitation probability is 10%, so you should add clothes sooner or later. 20% and 10% are clear and concise. With the rapid development of science and technology, every middle-aged person is now equipped with various styles of mobile phones. Glenn Wilson, a psychologist at Royal College, University of London, proved that reading short messages with his head down all the time will lead to low work efficiency and slow down the brain reaction ability of staff, and the IQ of people who read short messages often will drop by 10%, which once again proved in percentage form that although mobile phones provide convenience for people, they are very harmful to human health. This is the information about percentage that I found in my life. I believe that as long as you observe carefully, you will also find that percentage is everywhere in your life.