Among the following numbers, which one is closest to (1/2).
在下列数中，多少最接近(1/2)．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">49 / 100</gadget>
<output>49/100 = around 0.49</output>

<gadget id="calculator">(1/2) - (49/100)</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">1 / (1/100)</gadget>
<output>100</output>

<result>49/100 = around 0.49</result>