During the summer vacation, the Experimental Primary School carried out summer camp activities. A total of 248 campers, fifth grade accounted for (7/8). And (5/7) of the fifth-grade campers are girls, what percentage of the fifth-grade campers are boys?
暑假中，实验小学开展夏令营活动．共有营员248名，五年级的占(7/8)．而五年级宫员的(5/7)是女生，五年级营员的男生占营员人数的几分之几？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 - (5/7)</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(2/7) / 248</gadget>
<output>1/868 = around 0.001152</output>

<gadget id="calculator">248 * (7/8) * (1/868)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>