Peter claims that when a number x is increased by 10% and then decreased by 10%, the value of x is unchanged.
His calculation: x(1 + 10% - 10%) = x
Peter os wrong. Point out the mistake.
收錄日期: 2021-04-23 19:43:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070726000051KK03115