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If the cost price is Rs.100, then to get a profit of 20%, the selling price
should be Rs.120.
If 120kg is to be sold, and the dealer gives only 100kg, to get a profit of 20%.
How many grams he has to give instead of one kilogram(1000 gm).
120 gm ------ 100 gm
1000 gm ------ ?
(1000 * 100)/120 = 2500/3 = 833 1/3 grams.
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