Tell me the meaning of the following percentage (1). Class 6 (1) has 50% students swimming?

Thinking of solving problems: according to the meaning of percentage: the number indicating that one number is a percentage of another number is called percentage; According to this, it can be analyzed in reverse.

① In Class 6 (1), 50% of the students will learn to swim, which means that the number of people who can swim in the class accounts for 50% of the total number of students in the class;

② The land area on the earth accounts for about 29%, that is to say, the land area on the earth accounts for about 29% of the earth's surface area;

③ The enrollment rate of disabled children has exceeded 60%, that is, the enrollment rate of disabled children accounts for 60% of the total number of disabled people;

④ The turnover of Mei Jia supermarket is 20% more than that of Dada supermarket, which means that Mei Jia supermarket accounts for 20% of the turnover of Dada supermarket.

⑤ The enrollment rate of primary school graduates in China was about 97% in 2002, which means that the enrollment rate of primary school graduates in China accounted for 97% of the total number of primary school graduates in 2002;

The attendance rate of Class 6 (3) today is 97.5%, which means that the attendance rate accounts for 97.5% of the whole class.

2. Tell me what the following percentage means.

In Class 6 (1), 50% students will learn to swim.

(2) The land area on the earth accounts for about 29%.

(3) The enrollment rate of disabled children has exceeded 60%.

(4) The turnover of supermarkets in Mei Jia is 20% more than that of large supermarkets.

(5) In 2002, the enrollment rate of primary school graduates in China was about 97%.

(6) The attendance rate of Class 6 (3) today is 97.5%.