SOLUTION: By selling 100 bananas, a fruit-seller gains the selling price of 20 bananas. His gain percentage is?

Question 939624: By selling 100 bananas, a fruit-seller gains the selling price of 20 bananas. His gain percentage is?
Answer by laoman(51) (Show Source): You can put this solution on YOUR website!
Let the price of 1 banana be x
Selling price of 100 bananas is 100* x
Gain, i.e profit after selling is 20* x
To find percentage gain, we need Cost price
Cost price = Selling price- profit =100x-20x=80x
Therefore %Gain = Gain/CostPrice *100
=
%Gain = 25%
QED
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