Team A transfers 20% of the number of people to team B. At this time, the number of teams A and B is equal. The original number of people in team B is the same as that of team A.
甲队把人数的20%调入乙队，这时甲乙两队人数相等，原来乙队人数是甲队的多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">100 * (1/5)</gadget>
<output>20</output>

<gadget id="calculator">100 - 20 - 20</gadget>
<output>60</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>