Calculate the formula according to the meaning of the question:
All books: 320(2/5)= 800.
Storybook: 320(4/3)= 240.
So there are 800 books and 240 story books.
Decimal multiplication and division:
Fraction multiplied by integer, denominator unchanged, numerator multiplied by integer, and finally divisible offer points. Fraction multiplied by fraction, numerator multiplied by numerator, denominator multiplied by denominator, and finally divisible offer points.
Divide a fraction by an integer and the denominator remains the same. If the numerator is not a multiple of an integer, multiply this score by the reciprocal of the integer, and finally the offer score can be reduced.