There are 21 boys and 24 girls in the first class of the sixth grade. How many girls are in the whole class?
六年级一班有男生21人，女生24人，女生是全班的多少
<gadget id="calculator">21 + 24</gadget>
<output>45</output>

<gadget id="calculator">24 / 45</gadget>
<output>8/15 = around 0.533333</output>

<result>8/15 = around 0.533333</result>