Ravi buys some toffees at 5 for a rupee and sells them at 2 for a rupee. His gain per cent is


Cost Price of 1 toffee=Rs.1/5


Selling Price of 1 toffee=Rs.1/2


Gain = SP – CP


= 1/2 - 1/5


= 3/10




= 150%

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