The original price of a potion is 3.8 yuan per bottle, and the price is reduced to 3.42 yuan. How much is the current price lower than the original price?
一种药水原价每瓶3.8元，降价后为3.42元．现价比原价降低了百分之几？
<gadget id="calculator">3.8 - 3.42</gadget>
<output>0.38</output>

<gadget id="calculator">0.38 / 3.8</gadget>
<output>0.1</output>

<result>0.1</result>