Xiao Qi bought 20 pencils and gave 4 to his neighbor's little brother. What percentage of the total number of pencils are the remaining pencils?
小齐买了20支铅笔，送给邻居小弟弟4支，剩下的支数占总支数的几分之几？
<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>