There are first, second and third prizes in the composition competition. The number of winners of the first prize is (2/3) of the number of winners of the second and third prizes, and the number of winners of the first prize accounts for ((())/(()) of the total number of winners )).
作文比赛设一、二、三等奖，一等奖获奖人数是二、三等奖获奖人数的(2/3)，一等奖获奖人数占获奖总人数的((())/(()))．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(2/3) / (5/3)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>