marked price?

the marked price of a toy is $120 and the percentage profit is 60%. If the toy is sold at a discount of 20%,the profit is????
SOLUTION
marked price 即標價﹐賣給顧客的價錢。
Since when sell at $120 profit is 60%.
So the cost of a toy is
120/(1+60%)
= $ 75
Now the toy is sold at a discount of 20%
Then its marked price becomes
=120*(1-20%)
=120*0.8
=96
the profit
=96-75
=$ 21

2007-04-13 23:57:30 補充：
你可以想成cost 是x則x(1+60%)=120所以x=120/(1+60%)