document.write( "Question 939624: By selling 100 bananas, a fruit-seller gains the selling price of 20 bananas. His gain percentage is? \n" ); document.write( "
Algebra.Com's Answer #572614 by laoman(51)\"\" \"About 
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Let the price of 1 banana be x
\n" ); document.write( "Selling price of 100 bananas is 100* x
\n" ); document.write( "Gain, i.e profit after selling is 20* x\r
\n" ); document.write( "\n" ); document.write( "To find percentage gain, we need Cost price
\n" ); document.write( "Cost price = Selling price- profit =100x-20x=80x\r
\n" ); document.write( "\n" ); document.write( "Therefore %Gain = Gain/CostPrice *100
\n" ); document.write( "= \"%2820%2F80%29+%2A100\"
\n" ); document.write( "%Gain = 25%\r
\n" ); document.write( "\n" ); document.write( "QED
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