The number of people in the sixth grade science and technology team of a certain school accounted for the number of sixth graders (12/25), and later 4 people participated in it. At this time, the number of people participating in the science and technology team accounted for the total number of sixth graders (13/25). Participate in a tech group?
某校六年级科技小组的人数占六年级人数的(12/25)，后来又有4人参加，这时参加科技小组的人数占六年级总人数的(13/25)，还有多少人没参加科技小组？
<gadget id="calculator">13 / 25</gadget>
<output>13/25 = around 0.52</output>

<gadget id="calculator">12 / 25</gadget>
<output>12/25 = around 0.48</output>

<gadget id="calculator">(13/25) - (12/25)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">4 / (1/25)</gadget>
<output>100</output>

<gadget id="calculator">1 - (13/25)</gadget>
<output>12/25 = around 0.48</output>

<gadget id="calculator">100 * (12/25)</gadget>
<output>48</output>

<result>48</result>