Lili bought 20 pencils and gave 4 to her neighbor Mingming. What percentage of the total number of branches are the remaining branches?
丽丽购买了20枝铅笔，送给邻居明明4枝．剩下的枝数占总枝数的几分之几？
<gadget id="calculator">20 - 4</gadget>
<output>16</output>

<gadget id="calculator">16 / 20</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>