(5/12)-(7/18)=how much.
(5/12)-(7/18)=多少．
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">7 / 18</gadget>
<output>7/18 = around 0.388889</output>

<gadget id="calculator">(5/12) - (7/18)</gadget>
<output>1/36 = around 0.027778</output>

<result>1/36 = around 0.027778</result>