There are 10 cards in the pocket, which are written -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, and one of them is randomly drawn. What is the probability of getting a negative number?
口袋里有10张卡片，分别写着-2，-1，0，1，2，3，4，5，6，7，从中任意抽出1张，摸到负数的可能性是多少．
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>