請問點計 ar 急急急

Assuming that Janet finished 0.14 of a story book each day for the rest of the week.
At the end of one week, Janet finished 0.14X7 = 0.98
The fraction of the book left unread =
= 1 - 98
100
= 2
100

= 1_
50

2010-06-13 20:39:58 補充：
The fraction = 1/50 = one over fifty

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One day of reading covers 0.14.
1 week of reading covers 0.14 x 7 = 0.98

Fraction left unread = 1 - 0.98 = 0.02

Janet 一日只睇了 0.14 (即14%) 的書, 即還有 0.86 (86%) 未睇.
一個星期有七日, 但第一日已睇了 14%, 假設她其餘日子不再睇, 即 0.86*6 = 5.16