If the number of girls in a class is reduced (1/3) to equal the number of boys, how much more girls are there than boys?
某班女生人数减少(1/3)就与男生人数相等，则，女生比男生多多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/3) / (2/3)</gadget>
<output>1/2 = around 0.5</output>

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