There are 120 students in the sixth grade of the Primary School Attached to the Normal University to participate in the mathematics open problem competition. The number of winners accounts for (3/10) of the total number of winners, and (1/3) of the winners are girls. What percentage of the total number of boys won the award? If the number of participants is 120, think about it, how to answer?
师范附小六年级有120人参加数学开放题竞赛，获奖人数占总人数的(3/10)，而获奖人数中的(1/3)是女生．获奖的男生占总人数的几分之几？若舍去参加的人数120人，想一想，怎样解答？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) / 120</gadget>
<output>1/180 = around 0.005556</output>

<gadget id="calculator">120 * (3/10) * (1/180)</gadget>
<output>1/5 = around 0.2</output>

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