1. "Two fifths of the story book has been read" means that (this story book) is taken as the unit "1", and it is divided into (5) books on average, (2) books have been read, (5) books have not been read.

2. Pear Tree | | | | |

Apple Tree-Apple Tree-Apple Tree-Apple Tree-Apple Tree-Apple Tree-Apple Tree-Apple Tree-Apple Tree-Apple Tree-Apple Tree-Apple Tree

The number of pear trees is (2) that of apple trees (1), accounting for (3) of the total (1); The apple tree belongs to the pear tree (2) (1).

4. 12 is (13 is 12), 3 has (9) thirds, (9/7) has 9 sevenths, and 1/3 has (7) quarters.

5. There are (6) true fractions with denominator of 7 and (countless) false fractions with numerator of 7; The maximum true score is (6) one sixth (5), the minimum false score is (6) one sixth (6), and the minimum band score is (1 and 1).

6.5 The red flag, the yellow flag and the blue flag are arranged in a row.

(1) The number of faces of the yellow flag accounts for (5) and (3) of the red flag.

(2) The number of yellow flags accounts for (10) of the total number of flags (3).

(3) What other questions can you ask? And answer.

What percentage of the total is the blue flag? 0 in 65438+5. )