數學問題...盈利和虧蝕,今晚要做完!!!!!!!!!!!

其實兩條公式就搞掂
一:利潤/本錢x100%
二:所蝕既/本錢x100%
即1係60/400x100%=15%
2係15/600x100%=2.5%

1)成本=$4oo 售價=$46o
盈利
460-400 = 60
盈利率
60/400 x 100% = 15%

2)成本=$600 售價=$585
虧蝕
600-585 = 15
虧蝕率
15/600 x 100% = 2.5%

教你呀:
無論盈利或虧蝕,只要大數減細數,但記著分母一定是用"成本",然後再x 100%

好好努力呀!^_^

1) (460-400)/400x100%=15%
2) (585-600)/600 x100%= -2.5%

1) 460-400=60 Profit is 60$
60
___
400 x 100%
=15% (increased)
2)600-585=15 Lose is 15$
15
__
600 x 100%
=0.25% (decreased)

1) 15% 1 - 460/400
2) 2.5% 1 - 585/600