The number of Yuhong Elementary School Helping the Disabled has increased from the original 5 to 16. What percentage has the increase been?
育红小学为民助残小组由原来的5个增加到16个，增加了百分之几？
<gadget id="calculator">16 - 5</gadget>
<output>11</output>

<gadget id="calculator">11 / 5</gadget>
<output>11/5 = around 2.2</output>

<result>11/5 = around 2.2</result>