The school holds a quality competition, with a number of first, second and third prizes. Among them, the students who won the first and second prizes accounted for (2/5) of the total number of awards, and the students who won the second and third prizes accounted for (2/5) of the total number of awards. 3), the number of second prize winners in the total number of awards.
学校举办一次素质比武，设一、二、三等奖若干名，其中获一、二等奖的同学占获奖总数的(2/5)，获二、三等奖的占获奖总数的(2/3)，则获二等奖的占获奖总数的多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/5) + (2/3)</gadget>
<output>16/15 = around 1.066667</output>

<gadget id="calculator">(16/15) - 1</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>