The number of girls in the chorus accounted for 60% of the total number, how much more girls than boys.
合唱队女生人数占总人数的60%，女生人数比男生人数多多少．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">100 * (3/5)</gadget>
<output>60</output>

<gadget id="calculator">100 - 60</gadget>
<output>40</output>

<gadget id="calculator">60 - 40</gadget>
<output>20</output>

<gadget id="calculator">20 / 40</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>