Fraction: It means that one number is a few tenths of another number, collectively called "fraction". "A few percent" means a few tenths, that is, dozens of percent, and a few percent means dozens of percent. 20% is two ten thousandths, that is, 20%, and 35% is 3.5 ten thousandths, that is, 35%.
Significance of percentage:
It can describe the proportion of things in the whole production and life more completely, and save a lot of unnecessary words. It is simple and appropriate, and there are several situations worth knowing.
For example: (1) Although the denominator is 100, the number of molecules can be greater than 100. Many people don't understand this, thinking that the molecule can't be greater than 100, but it does exist. For example, 200% means it is twice the original number.
For example, the deposit profit of a bookstore in the first half of the year was 6.5438+10,000 yuan, while the deposit profit in the second half of the year was 6.5438+0.20 million yuan, which can be expressed as "the deposit profit in the first half of the year was 20% higher than that in the second half, that is, 654.38+ 0.20%".
(2) Percentages sometimes cause misunderstanding, which requires us to distinguish them carefully. For example, many people think that an increase in percentage will be offset by a decrease in the same percentage. For example, a 50% increase in 10 equals 10+5= 15, while a 50% decrease in 15 equals 15-7.5=7.5. The final result is less than 10.