The cost price of 12 candles is equal to the selling price of 15 candles. Find the loss percent.

Let the CP of 12 candles = SP of 15 candles = Rs x.

Then, CP of 1 candle = Rs (x/12)

SP of 1 candle = Rs (x/15)

Loss = CP - SP = Rs { (x/12) - (x/15) } = Rs { (5x - 4x)/60 } = Rs x/60.

Now, loss percent = (Loss/CP)*100%.

= { (x/60) / (x/12) } * 100%

= { (x/60) * (12/x) } * 100%

= 20%

Therefore, there is a loss of 20%.

Hope it helps.

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