Hope Primary School had a physical examination last month, and Xiao Ming weighed 36 kg. Xiaohua said: "I am 20% lighter than Xiaoming." Xiaoyun said: "Xiaoming is 20kg heavier than (1/2) of my weight." Please ask a math question first and then answer it.
希望小学上月进行了体检，小明测得体重36千克．小华说："我比小明轻20%．"小云说："小明比我体重的(1/2)多20千克．"请你先提一个数学问题再解答．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">36 * (4/5)</gadget>
<output>144/5 = around 28.8</output>

<result>144/5 = around 28.8</result>