Answers

2015-01-18T09:47:50+05:30
 Let List Price  be X
Sale Price = 0.9X
He earns 20% profit after selling at 0.9X
Hence the cost price= 0.9X100/120=0.75 X
when he gives 20% discount the sale price is 0.8X
Hence gain percent = (Sale Price - cost price)100 /cost price
                             = (0.8X - 0.75X)100/0.75X
                             = 6.66%
His gain is 6.66%
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