Class 5 • There are 21 girls and 24 boys. How many girls account for the whole class?
五•一班有女生21人，男生24人，女生人数占全班人数的多少．
<gadget id="calculator">21 + 24</gadget>
<output>45</output>

<gadget id="calculator">21 / 45</gadget>
<output>7/15 = around 0.466667</output>

<result>7/15 = around 0.466667</result>