Mathematics

A computer game is marked at $320, and it is sold at a discount of 30%
It the discount is 48% of the cost price, find the profit per cent

The discount is 320x30% = $96
The sold price = 320 – 96 = $224
The cost price = 96 / 48% = $200
The profit percent = (224-200)/200 = 12%

The sold price $320x(1-30%)
=$320x70%
=$224

The cost price $320x(1-48%)
=$320x52%
=$166.4

The profit is 224-166.4/166.4x100%
=57.6/166.4x100%
=0.346153846x100%
=34.6153846%
=34.62% (cor. to 2 sig.fig.)

2006-11-23 22:43:58 補充：
樓上錯了樓下answer錯了 ha~ha~

The sold price = $320 * (1-30%) = $224

The cost price = $320 * (1 -48%) = $166.4

The profit =$224-$166.4/$166.4 * 100% = 34.6% (to 3.sig.fig)

2006-11-23 16:44:42 補充：
樓下的 你括號內的應該是d.p 啊