Question

if SP of 15 candle are equal to CP of 16 candles find the gain or loss percent

Answer 1

There is a gain of 6.67 %
Explanation:
It's a gain.
Gain= (1/15)100
=100/15
=6.666666%

Answer 2

It is given that cost of 12 candles is equal to the selling price of 15 candles.

It means the ratio of CP and SP is 5:4.

Let the CP of candle be 5x ans SP of candle be 4x.

Therefore the loss percentage is 20%.