Discussion :: Profit and Loss

A shopkeeper expects a gain of 22.5% on his cost price. If in a week, his sale was of Rs. 392, what was his profit?
Answer : Option C
Explanation :
C.P. = Rs.  \(\frac { 100 } { 122.5 } \)x 392  = Rs.  \(\frac { 1000 } { 1225 }\)x 392  = Rs. 320  
Profit = Rs. (392  320) = Rs. 72.
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