Class May 1 has 25 boys and 20 girls. How many boys account for the whole class?
五一班有男生25名，女生20名，男生人数占全班人数的多少．
<gadget id="calculator">25 + 20</gadget>
<output>45</output>

<gadget id="calculator">25 / 45</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>