The Municipal Art Association organizes a children's painting competition, with first, second and third prizes. The first and second prizes accounted for (4/9) of the total number of awards, the second and third prizes accounted for (7/9) of the total number of awards, and what percentage of the total number of awards were won by the second prize?
市美术协会组织少儿绘画比赛，设一、二、三等奖．获一、二等占获奖总数的(4/9)，获二、三等奖的占获奖总数的(7/9)，获二等奖的占获奖总数的几分之几？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">(7/9) - 1</gadget>
<output>-2/9 = around -0.222222</output>

<gadget id="calculator">(4/9) + (-2/9)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>