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The second question:

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The third question:

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The fourth question:

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The fifth question:

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This part of the extended materials mainly examines the knowledge points of scores:

A part of a whole, or more generally, any equal number of parts. The form of expression is the ratio of integer A to integer B (whether a false score in multiples of b is a score is controversial).

Fraction indicates the fraction of one number to another, or the ratio of one event to all events. Divide the unit "1" into several parts on average, and the number representing such a part or parts is called a fraction. The numerator is above and the denominator is below. When the denominator is 100, it can be written as a percentage, such as 1%.

Percent only represents the multiple relationship between two numbers, and cannot bring the company name; The score can represent a specific number or the relationship between two numbers, and the specific number can be represented by the company name. Any percentage can be written as a fraction with a denominator of 100, and fractions with a denominator of 100 do not all have the meaning of percentage.