Qingshan Village planned to afforest 16 hectares last year, but the actual afforestation was 20 hectares. How many percent more than the planned afforestation?
青山村去年计划造林16公顷，实际造林20公顷，实际造林比计划造林多百分之几？
<gadget id="calculator">20 - 16</gadget>
<output>4</output>

<gadget id="calculator">4 / 16</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>