標題:
有條math唔識做~超急~help~!!
發問:
A computer game software marked at $280 is sold at 20% off. If the discount is 35% of its cost price , find the profit per cent. 請列明步驟~thx~!
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discount = 280 x 20% = 56 cost price = 56 / (35%) = 56 x 100 / 35 = 160 selling price = 280 - 56 = 224 profit percent = [(224 - 160) / 160] x 100% = 40%
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