Number A is 20% more than number B, and number B is less than number A
甲数比乙数多20%，乙数比甲数少多少
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(1/5) / (6/5)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>