Proportion means that two proportions are equal, which is called proportion, and the four numbers that make up the proportion are called proportional terms. The two items at both ends are called external proportional items, and the two items in the middle are called internal proportional items.
Proportion is also a common term in technical drawing, which refers to the ratio of the linear size of a figure in a drawing to its corresponding physical elements. In mathematics, proportion is the proportion of the number of parts in a population to the total, which is used to reflect the composition or structure of a population.
The calculation formula of percentage:
Quantity ÷ total × 100= percentage. 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 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.