Percent grade is a commonly used scoring method, which is usually used to evaluate test scores, product quality, customer satisfaction and so on. The calculation formula of percentage grade is to calculate the percentage of a value according to a certain standard or reference value.

The calculation formula of percentage grade is as follows:

Percent grade = (this value-minimum value)/(maximum value-minimum value) × 100%

Among them, the numerical values are to be evaluated, and the minimum and maximum values are reference values or standard values. The minimum and maximum values can be any numerical values, but they must be known and the minimum value must be less than the maximum value.

For example, if a class's math score is 100, the lowest score is 60, and a student's math score is 80, then his percentage score can be calculated by the following formula:

Percentage grade = (80-60)/(100-60) ×100% = 40%

This means that the student's math score ranks 40% in the class.

The calculation formula of percentage grade can be adjusted according to different situations. For example, if the minimum and maximum values are not known, it can be estimated according to the distribution of data. In addition, if you need to round the percentage level, you can use standard rounding rules.

In a word, percentage grade is a simple and effective scoring method, which can be used in various evaluation tasks. Knowing the calculation formula of percentage grade can help us better understand and use this scoring method.