The price of elasticity of demand for scented candles is 1.5. The price of elasticity of demand for tapered candles is 2.0. The cross elasticity of demand for tapered candles with respect to the price of a scented candle is 1.5. If the price of a scented candle rises by 4 percent, the percentage change in the price of a tapered candle that will lead to no change in the quantity demanded of tapered candles is ________ percent