Hongxing Township planned to afforest 9 hectares last year, but actually afforested 12 hectares. What percentage is the original planned afforestation less than the actual afforestation?
红星乡去年计划造林9公顷，实际造林12公顷．原计划造林比实际造林少百分之几？
<gadget id="calculator">12 - 9</gadget>
<output>3</output>

<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

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