9分之5乘4分之3除9分之5乘4分之3

问题描述:

9分之5乘4分之3除9分之5乘4分之3

5/9×3/4÷5/9×3/4
=(5/9÷5/9)×(3/4×3/4)
=1×9/16
=9/16