If the number of boys in a class of grade six accounts for 4/9 of the whole class, then how many boys account for the number of girls?
六年级某班男生人数占全班人数的(4/9)，那么男生占女生人数的多少．
<gadget id="calculator">9 - 4</gadget>
<output>5</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>