A shopkeeper bought 50 pencils for rupees 80 and sells them at 40 pencils for rupees 90 .find his gain or loss per cent.
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Cost price of 1 pencil = 80/50 = ₹ 8/5 = ₹1.6
Selling price of 1 pencil = 90/40 = ₹9/4 = ₹2.25
Gain = 2.25 - 1.6 =₹0.65
Gain% = 0.65/1.6*100 = 40.625%
Selling price of 1 pencil = 90/40 = ₹9/4 = ₹2.25
Gain = 2.25 - 1.6 =₹0.65
Gain% = 0.65/1.6*100 = 40.625%
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