There are 48 students in a certain class, 18 girls, and then some girls are transferred, and girls account for 40% of the class. How many girls are transferred?
某班有学生48人，女生18人，后又转来若干女生，这时女生占全班人数的40%．转来女生多少名．
<gadget id="calculator">48 - 18</gadget>
<output>30</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / (3/5)</gadget>
<output>50</output>

<gadget id="calculator">50 - 48</gadget>
<output>2</output>

<result>2</result>