Percentage is a mathematical term, which means that one number is the percentage of another number, also called percentage or percentage. Percentages are usually not written in the form of fractions, but are represented by the symbol "%"(percent sign).
For example, 82% means 82%, or 82/ 100, 0.82. Sum and discount represent a few tenths, such as "70%" and "30%", which represent 70/ 100 or 70% or 0.7 respectively. Therefore, the percentage cannot be followed by the unit.
Percentage is widely used in industrial and agricultural production, science and technology and various experiments. Especially the percentage, is often used for investigation, statistics, analysis and comparison.
How to find the percentage?
For example, in Jilin Street Primary School, there are 1 100 students, including 198 sixth graders. What percentage of the students in the sixth grade account for the whole school? 198 ÷1100 = 0.18 = 18%. A: The number of sixth-grade students accounts for18% of the whole school.
How to find the growth rate?
For example, Jilin Street Primary School had 65438+0,000 students last year and 1 65438+0,000 students this year. Compared with last year, how many percent has the number of students increased this year? (1100-1000) ÷1000 = 0./= 10%. A: The number of students this year is10% higher than last year.
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).
Concepts and definitions:
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.
Percent is a way to express the value of proportion, ratio or fraction, such as 82% for 82%, or 82/ 100, 0.82. Sum and discount represent a few tenths, such as "70%" and "30%", which represent 70/ 100 or 70% or 0.7 respectively. Therefore, the percentage cannot be followed by the unit.
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)"
The relationship between two related numbers or quantities can be divided into two categories in primary schools, 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.