The mall sells a batch of apples. According to the initial price, it can make a profit of 0.4 yuan for every kilogram of fruit sold. Later, in order to expand the publicity, the mall adopts a price reduction. As a result, the daily sales volume doubles after the price reduction, and the daily profit is also higher than The original increase of 50%. How much is the price reduction per kilogram of fruit?
商场销售一批苹果，按开始的定价，每卖出1千克水果可获利0.4元，后来商场为了扩大宣传力度，采用降价销售，结果降价后每天的销量增加了1倍，每天获利也比原来增加50%．每千克水果降价多少元？
<gadget id="calculator">0.4 * 2</gadget>
<output>0.8</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">0.4 * (3/2)</gadget>
<output>0.6</output>

<gadget id="calculator">0.8 - 0.6</gadget>
<output>0.2</output>

<gadget id="calculator">0.2 / 2</gadget>
<output>0.1</output>

<result>0.1</result>