The cost price of 100 pencils equals the selling price of 60 pencils. The gain or loss percentage is

A33 and 1/3%

B66 and 2/3% ✓ Correct

C50%

D45%

Correct answer: (B) 66 and 2/3%

Explanation

There is a gain of 66 and 2/3%.

CP of 100 = SP of 60, so take each CP = Re 1, giving total CP 100 = SP of 60.

SP of one pencil = 100 / 60 = 5/3.

Gain per pencil = 5/3 - 1 = 2/3.

Gain% = (2/3) / 1 x 100 = 66 and 2/3%.

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