Wang Hong's weight is heavier than Li Yun's (2/3), so how much is Li Yun's weight lighter than Wang Hong's?
王红的体重比李云的体重重(2/3)，那么李云的体重比王红体重轻多少
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(5/3) - 1</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) / (5/3)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>