Cost price of 100 books is equal to the selling price of 60 books The gain percentage or loss percen...........

Quant (SSC) Profit and loss

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Cost price of 100 books is equal to the selling price of 60 books. The gain percentage or loss percentage is:

66 3/2%

67%

66%

66 2/3%

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Explanation:

Gain% or Loss% = x - y /y x 100%
x is the number of books the cost price of which is given = 100
y is the number of books the selling price of which is given = 60
By the short trick approach, we get
Gain percentage = 100 - 60 /60 x 100%
= 40/60 x 100% = 66 2/3%