There were originally 18 boys and 23 girls in a certain class, and then 4 girls were transferred. What percentage of the whole class are girls?
某班原有男生18人，女生23人，后来又转来4名女生，问女生人数占全班人数的几分之几？
<gadget id="calculator">23 + 4</gadget>
<output>27</output>

<gadget id="calculator">23 + 18 + 4</gadget>
<output>45</output>

<gadget id="calculator">27 / 45</gadget>
<output>3/5 = around 0.6</output>

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