For example, the satisfaction rate is 80%, which means that 80 people will be satisfied with every 100 people.

Percentage refers to the percentage that one number is another number, also known as percentage or percentage. Percentages are usually not written in the form of fractions, but are represented by the symbol "%"(percent sign).

Percent is a special fraction, the denominator is 100 and the numerator is not an integer. Percent indicates that one number is a percentage of another number, indicating a ratio. Percent is a way to express the numerical value of proportion, ratio or fraction, such as 82% for 82%, or 82/ 100, 0.82.

Percentages, also called percentages or percentages, are usually not written in the form of fractions, but expressed by percent signs (%), such as 4 1%, 1% and so on.

Because the denominator of the percentage is 100, that is, 1% is the unit, so it is easy to compare. Percent only indicates the relationship between two numbers, so you can't add units after the percent sign.

Professor Shi Ningzhong pointed out that the essence of mathematics is to know the relationship between numbers (more and less) at the same time, and further abstract it as "the relationship between numbers (big and small)"

We know that the relationship between two related numbers or quantities can be divided into two categories in primary school: one is the sum and difference of addition and subtraction, and the other is the multiple ratio of multiplication and division. The percentage belongs to the double ratio relationship.

Fractions closely related to percentages can exist as a single quantity, or they can represent the relationship between two numbers or quantities.