What Is Percent Composition?

Percent is the percentage of one number that is 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). ^[1]

The percentage is a special fraction with a denominator of 100, and its numerator may not be an integer. Percent means how many percent of one number is another number, and represents a ratio. Percent is an expression ratio,

Interaction of percentage and decimal

(1) Decimal fraction: remove

Percentages are widely used in industrial and agricultural production, science and technology, and various experiments. Especially in survey statistics, analysis and comparison, percentages are often used.

1. Percents often indicate a proportional relationship, but percentages can sometimes exceed 100% .

For example: In 2013, the growth rate of WeChat usage reached 203%.

2. The reference value of the nutrient in the nutrient composition table on the food box does not indicate the percentage of the substance in the food , but rather the proportion of the amount of the substance in the food to the normal daily intake per person. Explains why the percentages in the nutrient composition table often do not equal 100%.

For example, assuming that a normal person should consume 60 grams of fat per day, a food containing 6 grams of fat per 100 grams should be marked with 10% instead of 6% in the corresponding position in the nutrition table.

3. Survival rate, germination rate, attendance rate, oil output rate, score rate, etc. indicate that the percentage of the individual's total amount will not exceed 100% (maximum 100%)

4. Percents have different meanings in different situations . For example, the sentence "'The probability of precipitation tonight is 20%' means that the probability of rain (snow) tonight is 20%, and it does not mean that it is raining (snow) 20% of the time tonight.