The cost of producing a certain toy in a toy factory is 37.4 yuan, which is 6.6 yuan lower than in the past. How much is the cost reduced?
玩具厂生产某种玩具的成本是37.4元，比过去降低了6.6元，成本降低了百分之几？
<gadget id="calculator">37.4 + 6.6</gadget>
<output>44</output>

<gadget id="calculator">6.6 / 44</gadget>
<output>0.15</output>

<result>0.15</result>