考你地AR~

1.72/240=30%百分之三十


2.40/90=44.44%百分之四十四點四四

(1)
72是240的:
72/240x100%
=7200/240%
=720/24%
=30%

(1)72是240的百分之三十

(2)
40是90的:
40/90x100%
=4000/90%
=400/9%
=44 4/9%

2008-02-22 16:44:57 補充：
(2)40是90的百分之四十四又九分之四%

72除以240=30%

40除以90=44.44%

(1)72是240的百分之30
(2)40是90百分之44.444.....

1 七十二分之二百四十成一百%=三十%
2 九十分之四十成一百%=四十四又九分之四