The percentage is converted into a number, and the decimal point is moved two places to the left, so 4% is 0.04, and vice versa. The decimal point moves two places to the right.

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.

Common fallacies

1 and percentage are often proportional, but sometimes the percentage can exceed 100%.

For example, 20 13, the growth rate of WeChat usage reached 203%.

2. The nutritional reference value in the nutrient composition table on the food packaging box does not refer to the percentage of the substance in the food, but refers to the ratio of the content of the substance in the food to the average daily intake, which also explains why the sum of the percentages in the nutrient composition table is often not equal to 100%.

For example, if a normal person consumes 60 grams of fat every day, then a food containing 6 grams of fat per 100 grams should be marked as 10% instead of 6% in the nutrient composition table.

3. The percentage of individuals such as survival rate, germination rate, attendance rate, oil yield and scoring rate in the total amount will not exceed 100% (maximum 100%).